Good Dog: Behavior & Training
Does size affect behavior?
He chose the dog, but I chose the name,” the woman explained. Their dog was an especially petite Boston Terrier, but his name — Titan — was one more typically bestowed on a larger dog. I’d seen this type of incongruity before, and though it’s sometimes just for the sake of being ironic, often it’s about conflict. Couples who disagree about whether to add a large dog or a small dog to their family compromise by choosing a dog of one size and a name that’s usually given to a dog of another size. I’ve also met Pixie the Newfoundland, Tank the Bichon Frise, Bitsy the Bouvier and Goliath the Pug.
People often have strong opinions about what size dog best suits them. Some prefer small dogs because they’re more likely to be welcome everywhere, especially when traveling, while others gravitate to large dogs because they associate them with fun and friendliness, as well as kids and families. Sizebased biases are also common, and sad to say, I’ve heard a number of derogatory terms for both small and large dogs. And anyone with big dogs knows that people sometimes fear them even when their behavior is exemplary and a small dog is present whose behavior is not. One Bark reader implored me, “Don’t forget to cover that big dog stigma!”
Many people have asked the question, “How is the experience of having a large dog different than that of having a small dog?” Part of the answer may come from evaluating whether big and small dogs really are different in ways that extend beyond size, particularly in their behavior. Another piece of the puzzle involves determining if people’s behavior toward and expectations of dogs varies based on the dog’s size.
A Sizeable Spectrum
People with little dogs who don’t want them to help themselves to food simply avoid picnicking on the floor and are careful not to leave chairs where they can be used as stepping stones to the table or counter. People with large dogs often find that no place lower than the top of the refrigerator is safe or truly off-limits. With a large dog, the accidental consumption of dangerous foods, such as chocolate, is far less likely to lead to serious consequences than for a smaller dog because it takes much more for the dose to be toxic to a larger dog. Similarly, the few extra treats that lead to weight gain in smaller dogs may be no big deal for a large dog. Finally, helping a large dog with mobility issues can be physically demanding for the caregiver.
Some worry about big dogs around children, but I must confess that I worry when we dog-sit a friend’s sixpound Pomeranian. My kids are gentle with him and do a good job of being kind and respectful, but I’m still worried that they’ll collide with him and cause an injury completely by accident, no matter how actively I’m supervising. With bigger dogs, that isn’t as much of a concern.
Many people point out the advantages of small dogs in urban environments: it’s easier to rent an apartment (weight limits favor them); tight living spaces may be easier to share; and getting small dogs into and out of an apartment building, especially while you’re housetraining them, is far less of a challenge. Yet traits that can be troublesome for urban living — high exercise needs, sound sensitivity, a tendency to bark excessively — have nothing to do with size. Some dogs are beautifully suited to life in the city, and others are not.
So, are behavioral differences sizebased? For the most part, the answer is a resounding “No!” Dogs of all sizes love to play chase, fetch, go on walks, run off leash, meet new people, romp with their best dog buddies, participate in training sessions and eat tasty treats. By the same token, dogs of all sizes are vulnerable to sound sensitivity, exhibit separation anxiety and aggression, jump on people inappropriately, bark to excess, chew on shoes, dig in the garden, or have accidents on the floor. They all wag their tails (if they have them!) in joy.
And yet, there are clearly differences between individual dogs, based perhaps on age, gender or the environment in which the dog lives and was raised. While the similarities in dogs of different sizes are far greater than the differences, can we deny those differences?
Science Steps In
The study’s most important overall finding? There are significant differences in behavior between large and small dogs and between guardians of large and small dogs. The researchers reported that a range of interactions between people and their dogs are related to the size of the dog.
Small dogs were reported to be less obedient, slightly more often aggressive or excitable, and more anxious and fearful. People with small dogs also reported a lower level of consistency in their interactions and enforcement of rules than did those with larger pups.
Much has been made of the practice of treating small dogs like babies, though it’s hardly surprising that it occurs. Babyish features affect human caretaking behavior; we’re evolutionarily hardwired to find big eyes, small size and proportionally large heads endearing. Psychologists call this the “Aww phenomenon.” If babies weren’t so cute, parents could be less likely to respond to their needs, and the offspring would be less likely to survive.
Dogs seem to elicit this same “aww” response in humans, especially small dogs, and even more so, breeds with pronounced juvenile features such as Cavalier King Charles Spaniels, Chihuahuas, Japanese Chins, Pugs and Boston Terriers. Since babies affect our hormones, raising the levels of oxytocin — nicknamed “the love hormone”— it stands to reason that adorable dogs do, too.
Socialization, Training and Other Interactions
Many say that their small dogs are “people” dogs and don’t like other dogs; lots of people with big dogs say the same thing. Size notwithstanding, positive experiences with other dogs during puppyhood are the best way for a dog to develop good manners. Absent enough of those experiences, dogs of all sizes face social challenges.
Well-trained dogs are always a joy, but training is another way in which interactions between people and dogs differ based on size. Two research studies found that small dogs do not receive as much formal training as large dogs (Kobelt, et al.; Masters and McGreevy). Also, people play fetch more often and do more tugging and nose work with big dogs than with small ones, and are more likely to take them running or biking (Arhant, et al.). Arhant’s study concludes that differences in people’s behavior may account for the higher rates of disobedience in small dogs.
Codes of Conduct
For example, small dogs are more likely to be allowed in our beds and on our laps (Westgarth, et al.). Practical considerations are at work here. Having a 25-pound dog jump or sit on you is one thing, but having a 100-pound dog do it is another. Others encourage little dogs to jump up on people and get on the furniture, but rarely invite big dogs to do so. Jumping up isn’t the only thing that’s treated differently. The behavior that is considered a nuisance in a small dog may be deemed antisocial in a large dog. Even aggression and other serious behavioral issues are more likely to be tolerated in small dogs.
As evidence that some people with small dogs don’t take undesirable behavior seriously, consider this story: an eight-pound Chihuahua escaped from his home, bit someone and was declared a dangerous dog. When a representative from animal control came, the dog’s people apparently thought it was a joke. One of them was reported to have said, “I broke out laughing. I said, ‘Look at the dog, do you see the dog going after you?’ The guy kind of got upset when I started laughing at him.”
For years, I have specialized in cases involving aggressive dogs, and to be honest, the size of the dog sometimes makes a difference in how I feel about the threat they represent. I once had a very aggressive Dachshund in my office, followed by a Chesapeake Bay Retriever with similar issues. During both appointments, I employed all the cautions necessary in this line of work. Still, throughout the appointment with the Chessie, I was aware of being afraid, while with the Doxie — though I knew I was at risk of being bitten if I made a mistake — I just didn’t feel the same anxiety. Both dogs were equally aggressive, but the size factor affected my fear response.
I’m not alone in reacting differently to aggressive dogs based on their size. Large dogs are more likely to be euthanized for aggression (Reisner, et al.), though another study (Guy, et al.) found that the average “biter” tended to be a smaller dog. It’s possible that greater tolerance for this behavior in small dogs allows genetic tendencies toward it to persist.
In some ways, there are correlations between size and breed characteristics. Many small dogs are terriers and earthdogs, types that have been deliberately developed to be tenacious and curious as well as to dig and explore. If dogs are bred for those characteristics, such behavior will have far more to do with genetic inf luences on behavior than with size.
Also related to breeding, Arhant, et al. found that small dogs were more likely than large dogs to come from pet stores, which generally acquire their “stock” from puppy mills. When you consider that puppy mills are notorious for environmental deprivation and risky breeding practices, it is perhaps no surprise that small dogs are burdened with more problematic behavior..
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What dogs do — their behavior! — is what makes them good company, great friends and essential members of our family, and very little of that has anything to do with size. When dog people swap stories, they are not about the size of the dog, but about the experiences we have in common — the joy, the angst, the training, the vet emergencies, the photos, the occasional chewed shoe, the games, the walks, the friendship, the fun and the love. It’s always a big love, no matter what size the dog.
Good Dog: Behavior & Training
The science behind the behavior
I had always assumed that dogs shake vigorously after a bath or a swim in order to share massive quantities of water with all people in the immediate vicinity. That hypothesis fits in with my philosophical view that dogs have a generosity of spirit that knows no bounds and that they love us very much. It also matches my personal experience as a dog groomer and as a dog guardian.
A recent study takes a far more scientific approach to this behavior. Mammals that are wet suffer the risk of hypothermia, so water removal is a serious issue. Animals who remain wet can use 20 percent of their daily energy staying warm and generating the heat necessary for evaporation of that water. If an animal can quickly and efficiently remove excess water, they will dry faster, suffering less risk from the cold and saving energy.
In “Wet mammals shake at tuned frequencies to dry”, Andrew Dickerson, Zachary Mills, and David Hu enlighten us about the specifics of shaking. They studied the water removal affects of shaking behavior in animals ranging in size from mice to bears, and including dogs.
These researchers observed mammals shaking themselves when wet and came to several conclusions. One is that there is a mathematical relationship between the size of the animal and the frequency with which they shake. The smaller an animal is, the more water they take on relative to body weight, and the faster they shake to remove that water. Smaller animals shake faster (at a rate of 29 oscillations per second for mice) while larger animals shake more slowly (4 oscillations per second for bears.) As animals in the middle of the size range studied, dogs had an intermediate rate of 5-7 oscillations per second depending on the size of the dog. The dogs in the study included members of various breeds: poodle, Labrador retriever, chow, Siberian Husky and Chihuahua.
Another conclusion of the researchers is that the ability of mammals to remove water relates to a property of their skin—its looseness. The amplitude of the shake is increased by loose skin. Though the rotation of the spinal column only reaches 30 degrees, the skin movement allows a total rotation of up to 90 degrees. Loose skin in mammals has previously been hypothesized to help with limb movement but this study suggests another function—extra movement in shaking that allows additional water removal.
If you’ve ever been near a wet dog shaking, it will come as no surprise at that dogs, as well as other mammals, can remove about 70 percent of the water from their fur with just a few seconds of shaking. The effectiveness of shaking behavior is extraordinary, though I must confess that I rarely appreciate it when I experience it at close range.
Dog's Life: Lifestyle
A deep emotional connection with our pets brings many benefits
When I’m having a bad day, my dogs know just how to lighten the mood and bring a smile to my face. Pet lovers have long known that animals lower our stress levels, and that fact has been proven by scientific research over the years.
A new study published in the Journal of Research in Personality looks at the relationship we have with our pets from the perspective of attachment theory. Like parents or friends help people develop a sense of internal security and confidence, researchers believe that our pets help give us the confidence and support needed to live healthy lives.
Their study set out to prove the impact our animals have through two experiments.
Both studies had participants complete a “pet attachment questionnaire” that measured emotional connection. In the first experiment, they were asked to list their personal goals for the future and rate how likely they were to achieve them. In the second experiment, they had to perform an extremely difficult word test.
Some of the participants were asked to write a brief description of their pet before they completed the respective task. In the first study, researchers found that those who wrote about their pet generated more goals and expressed more confidence that they would achieve them as compared to the control group. In the second experiment, those who wrote about their pet had lower stress levels during the test than those who did not.
Interestingly this result was only found among those who had a high emotional connection to their pet. There was no benefit for people who had a distant relationship with their pups.
Non-dog lovers may never quite understand the special relationship we have with our pets, but I know that I owe my dogs so much thanks for the support and love they give me!
Good Dog: Studies & Research
When operant conditioning clicked (and clucked)
On a warm and slightly overcast morning in 1967, a rusty, mustard-colored station wagon slowly approached the terminal at San Francisco International Airport. Wheels still rolling, a door opened and something gray jumped out. As the wagon continued on its way, an animal headed toward the terminal. It was a cat.
Straight five steps, then wait. The glass door opened and as a portly man in a business suit dragged his overnight bag through it, the cat darted in. Straight 10 paces and the cat was inside the terminal. It headed left 20 feet, then right 30 feet, then left two more feet. No one seemed to notice. The cat settled under a bench where two men sat, engaged in intense conversation. Ten minutes passed, then 20; the cat lay patiently, its tail occasionally twitching.
Then, abruptly, the cat stood up and retraced its steps. Two feet to the right, 30 feet to the left, 20 feet to the right and out the glass doors. Once again, the station wagon pulled up and without stopping, a door opened. The cat leaped in. Mission accomplished.
The project, commissioned by the CIA and run by Animal Behavior Enterprises, had been a success. The cat’s cochlear implant (a device agents used to listen to the cat’s environment) had proven reliable, and its months of training using the relatively new technology of operant conditioning had proven effective for this intelligence operation.
Does this sound preposterous? Would it sound less preposterous if the trained animal had been a dog? Thanks to the science of operant conditioning, European police and military teams have been able to train their working dogs to perform at a much higher and more reliable level than had been possible using traditional coercion- based methods.
This type of training is no small feat. In 1996, Simon Prins, co-author of K9 Behavior Basics: A Manual for Proven Success in Operational Service Dog Training (2010), was hired to lead an innovative project for the Canine Department of the Netherlands National Police Agency. A test project with a three-year timeline, it would continue if it were a success. The project included a detailed list of tasks for dogs to perform.
“This included normal operational tasks, such as tracking, and explosive and narcotics detection,” says Prins, “but also climbing, rappelling, traveling by helicopter and boat and, the most challenging, training dogs to work with cameras and to follow radio or laser guidance at long distances.”
Although Prins had been a patroldog handler in the regional police force for only a few years, he was selected for this project because he was seen as an innovator. “I had been questioning our traditional force techniques because I noticed that dogs would shut down and stop working, or my police dog would become aggressive to me and to the trainer. So I was already looking for new methods.”
At this point, you may be asking yourself — given the fact that people have been training dogs for more than 4,000 years — why did traditional trainers feel these new tasks were impossible? Also, if a guidance system had already been developed for cats in 1967 in the U.S., why did it take Prins three years to reinvent the wheel 30 years later?
Bob Bailey, who worked on the 1967 project and later became co-owner of Animal Behavior Enterprises after marrying its cofounder, Marian Breland, explains. According to Bailey, it was the advent of animal training and behavior as a science that allowed them to develop the system for dogs, cats and, later, dolphins. “Dog training has been practiced as an ancient craft,” says Bailey. “The science of training wasn’t developed until the 1940s with B.F. Skinner.”
What’s the difference between craft and science? According to Bailey, “Crafts generally develop over thousands of years and tend to preserve what’s old and what has been done before. Information is passed down in secret from master to apprentice, and the apprentice must never question the master.” As a result, when errors are introduced, they tend to be preserved. Another characteristic of a craft is that a change is usually designed only to solve an immediate problem. “Rarely do they look for general principles,” says Bailey.
Science, on the other hand, is a systematic way of asking questions, a process that eventually weeds out mistakes. It’s guided by principles and data, and researcher’s approaches change and are revised as new information comes to light. As a result, science advances quickly compared to craft.
Bailey backs up his description with an example: “For 1,000 years, the Chinese used gunpowder to build small rockets. Then the Turks decided to build bigger ones, which they used on the British. It took them 800 years to develop the technology.” Then, in the 1900s, science and technology stepped in. In 1926, American rocket pioneer Robert Goddard launched the first liquid- propellant rocket. In 1949, less than 25 years later, the U.S. sent a rocket to the moon.
“So it took 800 years of craft to send a six-foot rocket half a mile and less than 50 years of science to send a rocket to the moon,” Bailey summarizes.
From Puzzle Boxes to Bells and Whistles
Others were making discoveries at the same time, but the one who really put things together was B.F. Skinner. Through many experiments, Skinner developed the principles of operant conditioning, which describes how animals cope with their environments.
Skinner found that animals learn to repeat behaviors with consequences they view as positive and to avoid behaviors with those they view as negative. They learn best when the positive or negative consequence is timed exactly to the behavior, and their learning rate is directly proportional to the rate at which the behavior is reinforced.
Research and technology advanced quickly, and within only eight years, operant conditioning had made its way out of the lab into an applied setting. During World War II, Skinner, who wanted to help with the war effort, set out to train pigeons to guide missiles by pecking at an image of the target site on a screen in a project called Project Pigeon. To demonstrate to the navy how it worked, Skinner took six pigeons and the apparatus in which they were trained to Washington, D.C. The demonstration was successful, but the navy turned him down; the admirals may have been taken aback when Skinner opened the chamber, which resembled a Pelican missile warhead, and they saw three pigeons pecking away.
Skinner’s two graduate students, Marian Breland and her husband, Keller Breland, had dropped out of their degree programs to help with Project Pigeon. They learned a lot while working with Skinner, more than they had learned in class, and became skilled at shaping — a process by which a goal behavior is taught in increments, systematically rewarding intermediate behaviors. They also learned about secondary reinforcers — unique tones such as a clicker or whistle that, when paired with food, could be used to tell the animal exactly when it had done something right.
The couple, who saw how powerful these nonforce techniques could be, decided that when the war was over, they would get into some kind of business where they would use operant technology to help solve problems for animals and, later, humans. In 1947, they founded Animal Behavior Enterprises (ABE), whose mission was to demonstrate a better, more scientific way of training animals in a humane manner using less aversives.
They started with dogs, but trainers shunned the new method, claiming that people had been successfully training for centuries and no new approaches were needed. Rebuffed on the canine front, the Brelands turned to other species. For 47 years, ABE trained animals for its own theme park, the IQ Zoo, in Hot Springs, Ark., as well as for shows across the country. At ABE’s height, the Brelands could have up to 1,000 animals in training at any given time, many for companies such as General Mills, who used them in commercials and at sales conferences. They also worked on animal behavior and training projects for the U.S. Navy and Purina, as well as for Marineland of Florida and Parrot Jungle, where they developed the first of the now-traditional dolphin and parrot shows. When they started, there was only one trained dolphin, whom it had taken trainers two years to get ready to perform. In six weeks, Keller trained two new dolphins to perform the same behaviors.
Bob Bailey met the Brelands when he was hired as director of dolphin training for the navy and Keller and Marian were contracted to help. “I spent six months at ABE learning to train many animals, including chickens.”
Three years later, the same year Keller passed away, Bailey joined ABE as assistant technical director and head of government programs. Later, he became research director too and then executive vice president and general manager. Eventually, he and Marian married.
Over the course of their career, the Baileys trained more than 140 species (or about 16,000 individual animals). In 1990, they retired and closed ABE. Then, in 1996, they received a series of calls from Simon Prins.
Inspired by Dolphins
“We didn’t want to deal with police or military because in our experience, they are punishment-based,” says Bob. In the U.S., the Baileys had come to feel that force-based trainers could not make the change to operant technology because eventually, they fell back on the method with which they were most comfortable. “These trainers take what we say and modify it. They take good operant-conditioning principles and modify them, and then say they won’t work.”
Eventually, as Prins continued to meet Bob’s increasing demands, Bob agreed to help. Prins came with a few other trainers as well as his superiors to the Baileys’ Hot Springs headquarters to learn by training chickens.
Animal Behavior Enterprises had tested many animals for learning purposes and found that chickens provide by far the best training model (find out why). Prins and his bosses quickly learned that training is a technical skill rather than a mystical, inborn ability. A science, not a craft. They trained chickens to selectively peck just one type of object among a group of objects, and to perform tasks only on cue. They learned to train behaviors as a series of many little shaping steps, and to keep track of the outcome of each trial in order to determine whether they were having success or needed to fix their technique or plan. They did this all with positive reinforcement — without physically manipulating the chickens.
“Bob and Marian changed my whole perspective on animal training,” says Prins. As a result, he met all of the 1996 goals, and more. At first it was difficult. ABE had developed remote-guidance systems for cats, dogs and dolphins by 1967. In months, they could train dolphins to perform many behaviors, including traveling 12 hours on a circuitous eight-mile route with no reinforcement. It took Prins three years to work out the methods.
“I talked to Bob by mail and phone, but it was difficult, because I was the only one here using these techniques,” he recalls. The process required thinking about what he wanted, planning how he would get it and then implementing the plan and collecting data. This was followed by an evaluation of the data and revisions to the plan based on the results. This process defines the field of applied animal psychology that the Brelands had created based on Skinner’s work. It’s something that most dog trainers are ill-equipped to do.
Whenever Prins got stuck, he fell back on his old habit of blaming the dog instead of recognizing that he had signaled the wrong behavior with his body language or had poor timing or an inadequate shaping plan. According to Bob, the traditional method of training would advise, “Get a bigger stick and beat the dog harder.” He reminded Prins that he needed to stop blaming the dog and look more carefully at video evidence to see what was going wrong.
“He had been training under the eye of other trainers, who for many years [had taught] him it was the dog’s fault, and you must correct the dog,” says Bob. “If you’re the one making the errors, you should be beating yourself, not the dog.”
The three-year process was a challenge, but he kept at it because he felt that it was the only way they could get the consistency and reliability they needed. As Prins explains, “If you have a punishment-trained dog, in the new situation when they are not sure what to do, they are afraid they will receive punishment, even if it is mild. Dogs just stop performing, [and] learning slows down or stops.” He had already found that it was much more effective to condition an animal to see the world as an environment in which something positive could occur at any moment.
So he stuck with it until he had the techniques down. As a result, the program was even more successful than anticipated. “Our dogs often work far from our position, often in the dark and always in an area they have never seen before,” he says. While trainers prepare the dogs for many situations, they can never truly simulate real-time operations, which usually happen in unpredictable surroundings and are stressful for the human handlers. But once they are taught by teaching dogs that performing in many different situations is fun, dogs are able to perform reliably.
Training speed has also improved. “[With] the first dog, [it] took me eight months to train him to follow a laser. With operant-conditioning, it now takes me four weeks.”
The training is heavily weighted toward positive reinforcement, but both Bailey and Prins point out that rarely, aversives are also used. Aversives are not used until trainers understand operant conditioning well and have been training extensively in it for six months, and only when a dog exhibits behavior that puts himself, humans or the operation at risk. The aversive may range from verbal reprimands to low-level shock. Before trainers use an electronic collar, they must wear the collar around their own necks and see what it’s like to be trained this way. They find out what it feels like when a correction is given, and even worse, given at the wrong moment as commonly happens even with the most skilled trainers. “Then they understand how difficult it is, and they do not like to use it,” says Prins. Overall, aversive methods comprise about 1/1000 of the training.
Their success has led to other countries, including Belgium and Norway, adopting this approach. Despite the advantage of being able to learn from Prins’s mistakes, all the trainers in his group experience some of what he did during his first three years. To select new trainers, he sends potential candidates through four five-day chicken training camps in Sweden. “The punishment trainers fall hard. We give them four days to see if they can make the change. The process is grueling,” he observes.
The change is worth it. Trainers see the difference, and the proof is not just in their impressions. It’s in the hard data: shorter training times, more dogs trained for less money, behaviors they could never train before and more consistent, reliable dogs, which lead to more successful missions.
Bailey explains that while a handful of trainers may be motivated to improve the treatment of their dog, “the trainers who actually make the changes are those who want more success and recognize that simply beating their dog more will not get that additional success.” Once they understand and become skilled at the operant technology, an added benefit is that they can finally enjoy their work and so can the dog.
Dog's Life: Lifestyle
Study finds a link between lymphoma and certain types of lawn care
I'm told that the pesticides used on my lawn are “organic,” but I still worry about the adverse effects that they might have on my pets. The dogs walk with their bare paws, roll around, and sometimes snack on the grass, so I usually keep them off of the lawn for a few days following treatment. Turns out that my fears may not be unfounded.
A recent study identified a link between canine malignant lymphoma (CML) and certain lawn care products. Researchers surveyed people whose dogs were treated at the Foster Hospital for Small Animals at Tufts University's Veterinary School, some with CML and some without.
The study found that the use of professionally applied pesticides was associated with a 70 percent higher risk of CML. There was also a higher use of self-applied insect growth regulators among the families with a CML dog. Interestingly (and thankfully!), researchers did not find a link between flea and tick control products and CML.
Researchers hoped to shed light on the causes of non-Hodgkin's lymphoma (NHL) in humans, a cancer that has doubled since the 1970's. It's easier to study the health effects of environmental risk factors in animals. CML was chosen because it has similar characteristics to NHL and responds similarly to treatment.
After reading this study, I'm already rethinking how I care for my lawn. It's great to see research that benefits both humans and canines!
Good Dog: Studies & Research
Researchers exploring the canine point of view
Doesn’t it sound reasonable to study the behavior of cranes? After all, cranes are quite different from humans — they can f ly, spend lots of time on one leg and don’t need an external GPS to find their way to Florida.
But what if we replace “cranes” with “dogs”? Why study dog behavior? Unlike cranes, dogs are not a wild species with feathers, migratory patterns or conservation needs. Dogs have lived alongside humans for at least 15,000 years; are ubiquitous in human cultures; and regularly find their way into our literature, hearts and beds (also unassisted by GPS, it must be noted). We think we know dogs just fine. What’s the point of all this scrutiny?
Dogs aren’t new in the world of research.
In other academic arenas, Marc Bekoff, Ian Dunbar, Michael Fox and the late Frank Beach all conducted extensive investigations into canine social behavior, physiology and development. And of course, in 1965, Scott and Fuller produced their seminal text, Genetics and the Social Behavior of the Dog. Konrad Lorenz, Nobel Prize–winner and acclaimed ethologist, also had dogs on the brain; if you doubt that, pick up a copy of his book, Man Meets Dog.
Despite the thousands of years dogs and humans had spent in close proximity, scientists had never explored either the relationship or the factors that allowed dogs to become our social partners.
Dogs’ perspective as members of the human environment was missing from the equation. “It’s odd that this companion animal who has been at our side longer than any other is really not well understood,” observes Kristina Pattison, researcher at the University of Kentucky’s Comparative Cognition Laboratory.
“Dogs suffer from a failure of imagination by those asking the questions,” explains Mary Lee Nitschke, professor of psychology, Certified Applied Animal Behaviorist (CAAB) and founding member of the Association of Pet Dog Trainers (APDT). “If you already ‘know’ a dog can’t think, you’re not going to ask whether it can think.”
In 1994, imagination and an open mind prompted the creation of the Family Dog Project at Eötvös Loránd University in Budapest, initially under the guidance of Vilmos Csányi, and now headed by Ádám Miklósi. Rather than taking the position that dogs’ place among humans was unworthy of scientific investigation, they put the dog, and the dog-human relationship, under the microscope.
While previous studies had investigated owners’ intimate feelings toward dogs, the dog’s perspective on this relationship had not received comparable attention (probably because canine penmanship is quite poor and they rarely complete questionnaires in a timely fashion).
To explore the dog’s perspective, the Budapest group placed companion dogs and their owners in a modified version of the Strange Situation Test, a behavioral experiment initially created to explore the mother-infant relationship from the infant’s perspective. The test is simple enough. In a novel environment, a dog experiences separations from and reunions with an owner and a stranger while a researcher records the dog’s behavioral changes. It turned out that dogs behaved much like human infants. The conclusion? The dogowner relationship, like the motherinfant relationship, fulfills the criteria for attachment.
This research sparked a shift in perspective and demonstrated that there’s a lot we don’t know about dogs and their relationships with humans. For example, it was commonly assumed that in order for a dog to develop an attachment bond with an owner, the dog needed to be acquired as a puppy, and within a narrow age window at that. But when the Strange Situation Test was applied to adult shelter dogs who had low or restricted human contact, these dogs also displayed attachment behavior toward designated “owners.” An additional study confirmed this; guide dogs bond with their blind owners even though their relationship forms later in the dog’s life. The takeaway message was twofold: older dogs can bond with new owners, and our assumptions about dogs are not always spot on.
Since then, scientific inquiry into dogs and the dog-human relationship has exploded. “It’s almost like dogs have been rediscovered by scientists, and there are so many different aspects they can study,” notes Mychelle Blake, APDT executive director.
Dogs have now attracted the attention of a range of disciplines, from animal behavior and psychology to evolution, genetics and veterinary behavior.
Nowadays, companion dogs, working dogs, village dogs and even shelter dogs have become study subjects.
While some are interested in contributing to a growing portfolio of insights into “the dog,” others have something else in mind. “Some of the present research does not directly pertain to dogs and the humans they live with,” notes Márta Gácsi, researcher with the Family Dog Project. “Comparative studies may be examining the roots of different human social behaviors, and not necessarily concerned with the dogs themselves.”
The Duke Canine Cognit ion Center, which is part of the university’s Evolutionary Anthropology Department, takes this multifaceted approach. Their website explains, “Our goal is to understand the flexibility and limitations of dog cognition. In doing so, we gain a window into the mind of animals as well as the evolution of our own species.”
“Research also has direct application for dogs and owners,” reminds Gácsi. Jennifer Bentlage, who’s working toward a master’s degree in the cognitive biology program at the University of Vienna’s Clever Dog Lab, agrees. “If I can explain the purpose of my research to my parents, then it’s worthwhile.” Bentlage, who is currently exploring social learning, has recruited her own dogs, Monty and Michel — shelter dogs from Spain and Greece, respectively —as test subjects for her project.
“I am very interested in the dog’s cognitive abilities because this relates very strongly to the pet owner,” explains Ian Dunbar, founder of the Association of Pet Dog Trainers (APDT), veterinarian, animal behaviorist and director of the Center for Applied Animal Behavior in Berkeley, Calif. “The importance of cognition is so that people realize who dogs are and what they can and cannot easily grasp.”
Dog cognition, a seemingly technical phrase, is simply a catch-all-term that describes dogs’ attention, memory, perception, problem-solving and mental imagery skills. As you might imagine, the questions are endless.
Crystal Thompson, a self-proclaimed dog-seminar junkie from St. Paul, Minn., thinks dog cognition research is paramount. “We have learned so much in the last few years that it behooves anyone interacting with dogs — owners, trainers, shelter workers, vet staff — to do a self-audit, to check their assumptions about dogs against what research is finding.”
We expect dogs to act a certain way, and they do.
Dogs have the potential to move in tandem with humans, stopping when we stop and starting again at our first subtle sign of forward motion, but magic is not the mechanism (although the resulting experience can certainly feel magical!). Instead, research finds that dogs are astute surveyors of human behavior, and everything from our gaze to our larger body movements provides meaningful information.
For example, researchers have found that the right side of the human face better expresses our emotional state, and when looking at other humans, we display what’s called a left-gaze bias, or a propensity to look toward the right side of the other person’s face, where all the clues are. When dogs look at human faces, they also display a left-gaze bias. Could your dog be sensitive to your emotional state? Yup.
And just as social contexts and relationships matter to you, they matter to your dog. Research has shown that if a stranger approaches your dog in a threatening manner, your dog will respond with avoidance/aggressive behavior. But if you approach your dog in the same way, your dog responds with tolerance and contact-seeking behavior. In short, dog owners feel connected to and supported by the dogs they live with, and for good reason.
But sometimes, dogs don’t act the way we want them to.
This is where cognition research comes in. Is the dog’s assessment of a situation comparable to the human’s, and if not, what is the dog’s vantage point?
Numerous studies have found that dogs attend to human communicative intent. As your significant other may have told you (possibly more than once), how you say it matters. Want a dog to come to you from across the room? Research by Patricia B. McConnell, and beloved Bark columnist, explored how different sounds affect dog behavior: “Four short notes were more effective at eliciting a come response and increasing motor activity levels than one longer continuous note.” In the real world, yelling “COOOME!” (akin to one longer continuous note) will most likely result in exasperation, but short, rapidly repeating notes, like “Pup-pup-pup,” will likely bring a dog on over.
Are dogs cooperative or competitive? Are dogs like chimpanzees, who more readily locate food in competitive situations when prohibited from going to a certain location. (A possible chimp translation might be: “The only reason you’re telling me not to go there is because that’s where the good stuff is, you jerk.”) Nope, dogs fare better in cooperative situations, finding food when informed of its location in a friendly, cooperative tone. Bringing this back to daily life: if you wonder whether the dog-human relationship is based on competition or cooperation, this is another check mark on the cooperative ballot.
Understanding the dog’s perspective is important because incorrect assessments of behavior can cause problems in dog-human relationships. “People think the dog is doing something to create trouble,” explains Floridabased Soraya Juarbe-Diaz, DVM, and board-certified veterinary behaviorist. “Almost everything on TV is about conf lict — a fight, someone trying to win or cheat; it’s very confrontational and we are always looking for a fight for superiority. Fortunately, animals don’t always work that way.”
And why can’t dogs just do what we want them to do? In one study, dogs who performed a 10-minute sit-stay (meaning, they exerted self-control) gave up quicker on a subsequent task than dogs not required to exert that initial self-control. This initial act of controlling their behavior depleted their energy, thereby adversely affecting subsequent behavior.
The consequences for not understanding dogs’ behavioral capacities can be dire. “The biggest cause of death in dogs is behavior problems, and failure to inhibit is at the root of many behavior problems,” explains Pattison.
“He barks all the time — failure to inhibit barking; he growled — failure to inhibit an aggressive response. He jumps up — failure to inhibit jumping. We expect dogs to forgo their species-typical behavior patterns and inhibit them in favor of a response we find more appropriate.” The applications for dog cognition research are vast. “The cognitive research says, look, the dog is not doing this to get your goat, he’s not doing this to diss you, he’s not trying to dominate you and take over the world,” says Dunbar. In other words, he’s just being a dog. Kelly Ballantyne, DVM, finds that the “final showdown” misconception often results in inappropriate owner-dog interactions and worsening of the dog’s behavior.
Dog-care professionals are taking note of this growing body of research. In 2004, APDT began including a science track at their yearly conference. Their mission is not simply to saturate trainers with research, but also to provide education about research methods and the nuances of study design. APDT leadership hopes that as more research hits the press, trainers will read studies with a critical eye and make informed decisions about their application for training. As Blake points out, “One study simply advances a hypothesis, and ongoing research is needed to improve our understanding of dogs.” “Research helps broaden our view of what is possible,” add Nitschke. “The fact that cognitive studies sometimes disagree with each other is wonderful, because it means there is more for us to look at. Different studies with different results broaden our vision of what is possible.”
Research also has application in the classroom. “My students were blown away,” reports Johnna Chamberlain, who teaches at the Lang School in New York City, a school for gifted children with learning differences. That’s how she describes her students’ reaction to “Dogs Decoded,” the NOVA special on dog cognition. “[My students] hadn’t considered that dogs were communicating through their barks, bodies or tails. Since [my students] might have social or emotional delays in relation to perspective taking, it was a big deal for them to consider their own relationships with pets and realize that dogs are communicating and thinking in their own unique way.”
Thompson looks at the breadth of cognition research from a different angle; she wonders whether owners are providing for their dogs’ mental needs. “It’s important for owners to realize that dogs have real mental abilities and needs. Putting food in a dog’s bowl is just wasting his brain. It’s the little things — Kongs, Tug-a-Jugs, hiding kibble around the house — it’s not hard, and it’s a simple way to engage their natural abilities.”
“How you interact with dogs often depends on your impression of their abilities,” notes Juarbe-Diaz. Reframing our expectations, with a little help from research, could set up dogs to succeed in our primate world. As Gertrude Stein said, “I am because my little dog knows me.” Shouldn’t we do the same for dogs?
Good Dog: Studies & Research
Venturing deep into the history of our oldest friends
Mark derr, long-time Bark contributor and historian of the dog, recently released a new book, How the Dog Became the Dog, in which he examines canine evolution. Derr covers a lot of ground in this work — 135,000 years, to be precise! We talked with him about the dawn of dog, and how our evolutionary pathway coincided with theirs.
Claudia Kawczynska: Canines going from fierce predator to “loyal companion” is quite a leap. Can you sketch how and why this might have happened?
So, wolves and humans had an affinity, and sociable wolves would often breed near human societies. As they began to do that, populations were established, though not everywhere and not in great numbers. One group of socialized wolves would die out and others would appear in other places at other times. There is evidence that destroying the structure of a wolf pack destroys the culture for the young, leaving them without guidance. Imagine that this happened over many, many generations, resulting in a more socialized “dogwolf” — or dog-like wolf. In that sense, you’re never going to find a single place for the [first domesticated] dog to have appeared. Rather, you have [the dog developing] wherever you have wolves and humans.
CK: What was in it for the wolves who paired up with us?
CK: Was this consciously directed?
CK: Like getting better food to feed those offspring.
CK: Did this relationship affect our own evolution?
CK: You note that with genetic data pushing back the dawn of dog to perhaps 135,000 years ago, the idea of neoteny has been turned on its head. How so?
Now, the latest research shows that a small number of genes have a big effect on everything from overall size and leg length to numerous other factors. I’ve been saying that for years. I didn’t know precisely what the mechanism was, but it wasn’t paedomorphism. There are other explanations, as it turns out. Not only that, but many of the features some consider neotenic are simply creations of modern breeders, who strove to make dogs more cuddly and humanlike by selecting for rounded skulls and large, forward-facing eyes.
To reiterate an important point, which I’ve made in numerous articles in The Bark and in my books, there is no evidence that dogs originated from selftamed, submissive, neotenic wolves. That theory — which is based on dogs originating during the Mesolithic Age, when people lived in settlements with garbage dumps — is not right. Dogs evolved much earlier than that and were in the camps with the hunters and gatherers.
CK: Back when we were both hunting the same species — together or separately — is it possible that wolves were hunting us too?
Take an example from Lewis and Clark, who describe great herds of bison out there on the plains, and the Indians who hunted them with their dogs. The wolf is described by Lewis as the “shepherd” of the bison. The way wolves hunt really isn’t that much different than the way herding dogs gather animals.
People like Barry Lopez have done work on the business of wolves and human cultures, and why wolves are so distrusted by humans. The answer, I suspect, is that once dogs and agriculture were firmly established, a divorce occurred between humans and wolves (and other wildlife), because those animals were seen as threatening our livelihoods. At some point, the wolf became a competitor — an enemy, even — not because it was hunting us, but because it was taking our livestock. The mediating force is the dog.
More recently, the conservation movement established a sharp divide between the wild and the built, a divide that really shouldn’t exist, but does. At that point, the wolf became one thing and the dog became another, and they are in opposition rather than what they are, which is very closely related. I don’t think that the wolf has ever been an enemy of humans, but I could be wrong.
CK: Pat Shipman, archaeologist and author of The Animal Connection, pointed out that it was unlikely that wolf packs tracked nomadic hunters in order to live off their spoils (among other things) because those wolves would have had to cross the territory of other wolves, which would have been highly dangerous for them. So it was more likely that the dogwolf and the human were partners in the hunt. What’s your take on that?
CK: Besides our shared characteristics, what else do we have in common with dogs?
Dog's Life: Lifestyle
New research looks at conflict deffusing behavior in canines
74 percent of dog lovers believe that their pups act guilty when they've done something wrong. There is plenty of evidence that dogs experience primary emotions, like happiness and fear, but it's hard to prove that they experience secondary emotions, like jealousy and guilt.
In 2009, Barnard College professor Alexandra Horowitz found that dogs were more likely to display behaviors we associate with guilt after being scolded. However, those who didn't misbehave appeared more guilty when scolded when compared to those who had actually done something wrong.
We know that over time canines evolved ways of communicating with humans, so is our dog's "guilty look" a learned response to diffuse conflict? Bark columnist and canine cognition researcher Julie Hecht and a team from Eotvos Lorand University set out to see if misbehaving canines would behave differently than dogs who had not done anything wrong and if people would be able to tell if their dog misbehaved based on their greeting behavior.
Like in the Barnard College study, the team found that dogs showed more guilt-associated behaviors when scolded. But then the findings got a little complicated.
Both groups of dogs were equally likely to act guilty whether they misbehaved or not, however dogs who actually did something wrong were more likely to show guilt-associated behaviors after subsequent greeting opportunities. So perhaps there is some element of guilt in our pups?
If there is, we're not very good at interpreting those signals. After accounting for people who knew their dogs had a history of stealing food, pet parents were not able to determine whether their pups misbehaved based on the greeting behavior.
Demystifying emotions like guilt and jealousy is difficult. But we're lucky to have many universities spearheading research in this area, so hopefully we'll know one day for sure.
Do you think that your dogs act guilty?
Dog's Life: Lifestyle
Study finds exercise helps prevent the debilitating disease
Responsible breeders have done a lot to combat hip dysplasia by researching lines and x-raying their dogs.
As a pet parent, I try to do all that I can to keep my pups healthy. To protect their bones and joints, I keep my crew at a healthy weight and avoid agility jump training until their growth plates close.
Now new research points to additional factors that could affect the development of hip dysplasia and change the way breeders raise their puppies.
According to scientists at the Norwegian School of Veterinary Science, puppies that exercised daily in a park had a reduced risk of developing hip dysplasia. Daily use of a staircase increased the risk.
They found that the period from birth to three months is particularly critical and that puppies born in the spring or summer and at breeders who lived on a farm had a lower risk, perhaps because they had more room to romp.
While previous studies found that rapid growth and high body weight increase the likelihood of developing hip dysplasia, this study found the opposite to be true.
Based on the study, the scientists recommend that puppies have regular off leash access to varied terrain, particularly if they may be predisposed to hip dysplasia.
This debilitating disease affects the lives of many dogs, so it’s good to have additional ways to be proactive in prevention. And the study also gives us yet another excuse to get our dogs outside to play!
Dog's Life: Lifestyle
Study uses MRIs to figure out what’s going on inside the canine brain
I spend so much time with my dogs that I feel like I know exactly what’s going on inside their heads. But of course I don’t. When I walk in the door, how do I know that Nemo is genuinely happy to see me or is just excited to smell all the interesting scents I brought home on my clothes?
Researchers at Emory University are setting out to understand what our dogs are thinking. Using an MRI to capture brain images, they’re looking at what parts of the brain activate in response to certain activities, like when we talk to our dogs. Scientists believe that this is the cornerstone to knowing what a dog is thinking.
Neuroeconomics professor Gregory Berns came up with the idea for the study after learning about canines in the military. He figured that if dogs can be trained to jump out of helicopters, teaching them to stay still in an MRI machine would be doable.
It took eight months for researchers to train two dogs to climb into the machine, put their head in the head coil, and stay still, all while wearing noise-reducing earmuffs. The first study looked at the dogs' brain response to hand signals that indicated whether or not they would receive a hot dog.
The researchers are now looking at more complicated studies on how dogs process human language and if they recognize people by sight or smell. I’m really looking forward to seeing the results of their work on canine empathy. The plan is to show dogs a photo of a person being poked with a pin and seeing if it triggers a pain response in the dog’s brain.
We know that our pups have a profound effect on our emptions and health. Knowing more about what our dogs are thinking can help us understand the effect that we have on them.
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