If you think that having dogs who bounce off the walls is problematic for them and for you, you are not alone. “Wall bouncing” is one of the repetitive behaviors that have long been considered indicative of poor welfare and chronic stress in the animals performing them. Other repetitive behaviors that are commonly seen in dogs are pacing, circling and spinning, all of which are generally regarded as stereotypical behavior.
Stereotypical behaviors are those that are not just repetitive, but also pointless and occur because of deficits in animals’ housing situation that cause frustration. That is, when animals are performing stereotypies, they are exhibiting behavior that has no function, and doing it over and over because their living environment is inadequate to meet their needs. A recent study in the journal Physiology and Behavior called Repetitive behaviour in kennelled domestic dog: Stereotypical or not? explored whether all the repetitive behaviors observed in kennelled dogs are actually stereotypies. The reason this question matters is that if their repetitive behaviors are stereotypies, it suggests that animals’ welfare may be compromised, but if they are performing repetitive behaviors for other reasons, then that conclusion may be suspect.
The researchers studied 30 male German Shepherds who are fully trained Police Dogs in the UK and live in a kennel that can hold as many as 40 dogs. They studied their behavior as well as their cortisol profiles (which indicate stress) before and after veterinary exams. They found that all but two of the dogs performed repetitive behaviors, but that very few of them displayed stereotypies. Repetitive behaviors were most commonly induced by a dog and handler walking past the kennel and by witnessing food preparation, which supports the idea that repetitive behaviors are simply a response to situations of high arousal rather than to stress.
The dogs could be divided into four groups based on the pattern of their repetitive behavior and the eliciting stimuli. Twelve of the dogs only exhibited repetitive behavior in response to husbandry events (including veterinary care) or not at all and showed them in less than half of the observation period. Five additional dogs also only displayed repetitive behavior in those same contexts, but they showed it more than half of the time that they were observed. Eight dogs performed repetitive behaviors in response to husbandry and when a person walked by or stood outside their kennel. The last five dogs displayed repetitive behavior in the absence of these and other specific stimuli.
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Though all the groups had similar baseline cortisol profiles, this last group had a cortisol profile following the exam that differed from the other groups. These dogs showed a decrease in cortisol immediately after the exam rather than the increase in cortisol seem in the other groups. This suggests one of two possibilities. One is that these dogs are under chronic stress and lack the physiological ability to respond typically to the additional stress of an exam. The other possibility is that these dogs are so attached to people, including their caregivers and the veterinarian, that being with them after a separation is such a positive experience that it balances out the stress of being removed from the kennel and examined.
The relationship between repetitive behaviors in dogs and their welfare status remains unclear, but this study suggests that there is not just one motivating factor behind the expression of repetitive behaviors. Many questions remain about repetitive behavior in dogs who are kenneled. Is it an indication of poor welfare? Could the repetitive behaviors be a result of reinforcement (food or attention) of these behaviors from people caring for the dogs? Why are the cortisol profiles different in dogs who exhibit repetitive behaviors without specific eliciting stimuli?