I recently read an article about a study from UC Davis, showing an increase in some cancers and joint problems in Golden Retrievers that are spayed or neutered as opposed to intact. As a shelter worker, this is so concerning. There are endless studies showing many health and behavioral benefits to spaying and neutering. It’s critical to look at the overall benefits to neutering before deciding to keep a dog intact based only on a limited study of one breed. As a shelter worker I have seen Intact dogs who are relentless in their pursuit of a mate. Digging out, jumping fences, chewing through walls, I've seen it all. Unaltered dogs roam more, get hit by cars more, fight more, bite more, and cause more human injuries and even fatalities. Intact females are prone to mammary tumors and pyometra and intact males can get testicular and perianal tumors. According to one veterinary study, 80% of unaltered males will develop prostate disease. Urine marking is a common problem in unaltered dogs.
My champion Borzoi was un-spayed because she was a show dog. She developed a pyometra at 6 years of age, had to have emergency surgery at great expense and was ill with a nasty pseudomonas bacterial infection for a long time afterwards. She didn’t fully recover her former health for nearly a year. She also got along wonderfully with our spayed female dog except when she was in season. Twice yearly, they had to be separated as they were prone to fight. After she was spayed, they never had another issue. Another un-spayed show bitch that I owned was so snappy and difficult for several months at a time around her seasons that I actually considered euthanasia. Thankfully I decided to spay her to see if it would help. It ended her show career but she was a delightful happy girl after that and lived to a ripe old age as a beloved pet.
The article mentioned that neutered dogs are more likely to be overweight causing stress on the joints. While it is true that intact dogs may burn more calories fretting and looking for a mate, this is a feeding issue, not a neutering issue. All dogs should be kept trim and fed properly for their needs regardless of altering status. Excess weight is also a cancer risk. Ethical breeders are going to neuter dogs with joint problems and keep those with good joints for breeding which may result in a skewed study.
I would be interested in knowing more about the way the study was conducted. As shelter workers, we often see dogs surrendered to the shelter to be euthanized when they become sick or infirm with issues including cancer and hip dysplasia. Often these dogs are unaltered. The level of responsibility that goes along with extensive veterinary care often includes neutering, so of course neutered dogs will see the vet more for other issues as well. Unaltered dogs are commonly surrendered to shelters for behavior problems such as roaming, barking, urine marking etc. Many of these issues can be improved on by neutering. The article mentioned the fact that service dogs were affected. Unaltered dogs are not suitable for service work as they become distracted by potential mates. Could the work they do assisting people be a factor in causing stress on the joints?
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The number one cause of preventable, premature death in companion animals in this country is euthanasia due to overpopulation. If people decline to alter their pets, this number will certainly climb. I have the greatest respect for those highly dedicated and ethical breeders out there, but for the rest of us there are endless, well-documented veterinary studies showing many health and behavioral reasons to neuter our pets.
For more information on the study see Joanna Lou's post.