Graduating in 1988, from the college of Veterinary Medicine, came with lots of information and challenges ahead of me in my veterinary career. I embraced those challenges and began finding my rhythm working with clients and their patients. The number of unwanted puppies/kittens was at an all-time high. Shelters were frustrated because a family would adopt a pet, and the shelter would request notification that it had been spayed or neutered once it was old enough for the procedure. Many times, that pet went without being spayed or neutered and ended up having a litter of puppies or the male dog was running around breeding any intact female in season. To curb this problem, it was decided to start spay/neuter procedures at an earlier age. As shelters had success with that practice the veterinary community took note and followed along. Today there has been a shift in thinking. Many breeders and veterinarians are encouraging pet owners to wait until the dogs are full grown before doing spay procedures. There are veterinarians on both sides of this debate advocating for the longevity and health of our furry friends.
Recently we were asked to spay two breeding females a person had acquired. He noted they were coming into heat every 4 months. He did have intact males on property which was causing disturbances amongst the pack. It was suggested to spay both females since he had no intentions of breeding them. We discussed briefly health concerns for females as they age. The female hormones when left unchecked can lead to infections and cysts. These conditions can lead to poor health and weight loss over time.
A surgery date was set, and he brought in Kimber, an 8-year-old yellow lab. She was underweight at the time of her presurgical exam. A Complete Blood Count (CBC) and Profile were done to check values. She had a normal body temperature. The owner had noticed a discharge and felt it was related to her most recent heat cycle. The White Blood Cell (WBC) was elevated at >40,000 (normal is < 17,000) with most of the cells being neutrophils and monocytes indicating long term infection. She also was slightly anemic at presentation. Her profile showed mild dehydration, and the owner was contacted to discuss her case. We suspected that she had a pyometra. The photo below shows the size of her uterus at the time of surgery. It was necessary to proceed with the procedure to remove the infection from her body so she could regain her appetite and body condition. A lactated ringer’s solution was started as an Intravenous drip to rehydrate her and perfuse her kidneys during the surgical procedure. A small mammary tumor was removed alongside the incision at the time of her skin closure. She recovered nicely and returned home the following day when her housemate Suzie came in for her spay procedure.
Suzie came in 2 months shy of turning 11 years old. She was a chocolate labrador retriever. The owner had no concerns about her aside from her multiple heat cycles in a year. Her weight was normal and her blood work was within the normal range. During her spay procedure it was discovered that her ovaries were cystic and enlarged. She did not have infection in her uterus like Kimber but having this condition would cause her to have irregular cycles and hormonal changes to her mammary tissues. The photo below shows the enlarged ovaries with cysts present in large numbers. No mammary tumors were found on Suzie at this time.
Why not spay to avoid both conditions? That is the question of the decade. If a dog or cat are spayed before their 2nd heat cycle their chances of mammary cancer is 0%. That Is a good reason to spay at a young age. We suggest right at 6 months, but it can be done sooner. We like to check for retained baby teeth at the same time as the spay. Right at 6 months all baby teeth should have fallen out. They will still get in molars up until 10 months of age, but the baby teeth should be gone.
I recently found this article from a veterinarian that I thought had some very good information about the debate on what age should sterilization procedures be performed. He included a nice chart with explanations of what he believes would be the best time for these procedures based on the size, sex, and age of the dogs. Give this information much consideration since leaving them intact has its issues as well. Not only the pathology at the time of surgery, like the above cystic ovaries and pyometra, but also issues to behaviors and other cancers that can be a problem if waiting to do the sterilization procedure.
https://humanepro.org/magazine/articles/deconstructing-spayneuter-debate
I personally have had all large breed male dogs that were neutered before 6 months of age and none of them had any issues with joints related to removing those hormones before they were mature. I did the procedures early to avoid hormonal influences that would lead to marking, wandering, territorial guarding, aggression, etc. I am concerned about the behaviors that will be evident with people waiting to spay and neuter when their pet is full grown. I have experienced that in practice in the 1990’s and believe me early spay and neuter is the way to go. Pets heal so much faster when they are younger. We have fewer complications with incision healing and swelling. The cost is going to be less.
Do your research. Talk to your veterinarian. Talk to your breeder. Then take all this information and decide what is right for your pet. What is right for one pet may be different for your next pet. There is no one size fits all on this topic. Have a Happy Valentine’s Day.