The Post That Ruined My Morning
- May 26
- 7 min read
Let's Talk Some Science!
Oh good, you're here. Because I need to talk about something I saw recently and I haven't been able to stop thinking about it.
Someone posted in one of my Facebook groups — they had two unaltered purebred dogs: one GSP, one Golden Retriever ... and an unplanned litter was on the way. The post was framed as an exciting curiosity. Has anyone owned one of these mixes?
Some of the comments were enthusiastic. Others? Not so much. By the time I went back to find the post later to see how the debate was taking shape, it had been deleted. Whether it was the people angry about the irresponsibility, or the people upset about diluting both bloodlines, or just the general heat of the internet — I'll never know.
What wasn't gone was the feeling it left me with. When you spend time around shelter intake numbers — and the volunteers who absorb those numbers personally, emotionally, at real cost to themselves — a post like that hits differently.
So let's talk about spay and neuter. Calmly. Because the conversation has gotten loud and weird over the last few years, and I think we can do better.
The Anti-Spay/Neuter Movement Is Real, and It Has a Point. Sort Of.
If you've been on any dog-related corner of the internet in the last decade, you've seen the shift. Someone asks when to spay their puppy, and the replies come fast. Wait until growth plates close. Wait until they're two years old. Wait until the hormones finish their work. And then, inevitably, someone drops a "Never" and then proceeds to reference the research out of UC Davis showing links between early sterilization and certain cancers.
Here's the thing: that research exists. The studies are real. And the people citing them aren't wrong that spay/neuter decisions are worth thinking carefully about.
But "worth thinking carefully about" and "don't do it" are very different conclusions.
A board-certified veterinary surgeon named Dr. Philip Bushby, who has spent decades performing spay/neuter surgeries with shelter animals, took a close look at those UC Davis studies for HumanePro magazine. What he found is worth understanding, because the studies have significant problems that rarely get mentioned when people cite them in Facebook comments.
The research population was skewed from the start. The UC Davis studies drew their data from a referral veterinary hospital, meaning the cases seen by regular primary care vets weren't represented at all. A family vet might treat a dog's mammary tumor or testicular cancer in-house, but refer the osteosarcoma or lymphoma case to a specialist. That makes serious cancers look more common in the referral data than they actually are in the general dog population. And here's the part that really sticks with me: one factor that potentially skews the research is that a primary reason people don't sterilize their dogs is that they can't afford the surgery. If someone can't afford a spay or neuter, what are the odds they're taking their pet to a referral hospital for specialized care? The intact dogs in these studies were already a self-selecting group.
The findings can't travel between breeds or species. This is the part that gets lost almost entirely in online discussions. The UC Davis authors themselves point out that you can't extrapolate from one breed to another, let alone from dogs to cats. But that nuance evaporates the moment someone pastes a headline into a comment thread. The person with the Beagle is reading data about Golden Retrievers and making decisions accordingly. That's not how research works.
The studies didn't control for anything else. Diet, lifestyle, environment, genetics, preventive care — in the best research, everything is controlled except the factor being studied. In studies reviewing past medical records, those variables aren't controlled. The associations the UC Davis studies found are real, but associations aren't causes. We don't actually know what's driving the correlations.
None of this means the research is worthless. It means it raised questions that deserve better-designed follow-up studies.
>>> It does not mean "don't spay or neuter your dog."
Now Let's Talk About What We Actually Know
Sterilized dogs and cats live longer than intact ones. A University of Georgia study analyzing over 70,000 patients found that intact dogs died at a mean age of 7.9 years, compared to 9.4 years for sterilized dogs — a 13.8% increase in life expectancy for males and 26.3% for females.
Data from Banfield, which operates over 1,000 veterinary hospitals with a shared record system, found that spayed female dogs lived 23% longer than intact females, and neutered males lived 18% longer. For cats, the numbers were even more striking: 39% longer for spayed females, and 62% longer for neutered males.
Yes, there are some cancers that appear at slightly higher rates in sterilized dogs. But the math deserves a closer look. If you total the incidence of all the serious conditions that are increased by sterilization, it comes to about 3%. The risk of an intact female dog developing mammary cancer is around 20%. The risk of pyometra — a life-threatening uterine infection — is around 24%.
And on the cancer question specifically: significantly increasing the incidence of a tumor that is relatively rare still leaves that tumor relatively rare. Significantly decreasing the incidence of a tumor that is common may make that tumor uncommon. The framing of "spay/neuter causes cancer" leaves out the part where not spaying causes a different, more common cancer at a much higher rate.
What About Timing — And What Counts as a "Large Breed"?
This is where breed and size actually do matter, and where the nuance the anti-spay/neuter crowd is reaching for has some legitimate grounding.
But first: what does "large breed" actually mean? It's fuzzier than people assume, and it matters because a lot of people are applying large-breed logic to dogs that don't qualify.
Generally, dogs under about 25 pounds are small breeds, 25–50 pounds are medium, and over 75 pounds are large. That puts Golden Retrievers right at the large-breed line. German Shorthaired Pointers, which many people assume are large because they're athletic and substantial-looking, are actually classified by the AKC as medium-sized, though they fall into a medium-to-large gray zone, with females typically landing in medium territory and only the bigger males nudging into large. Labradors, German Shepherds, Rottweilers, Great Danes — those are solidly large. Your Beagle, your Corgi, your Dachshund? The large-breed orthopedic concerns simply don't apply.
With that in mind, here are Dr. Bushby's recommendations based on the current body of research:
Shelter animals: spay/neuter prior to adoption, as young as 6 weeks
Owned cats: spay or neuter before 5 months
Owned female dogs: spay before 5 months
Owned medium- to small-breed male dogs: neuter before 5 months
Owned large-breed male dogs who are house pets: orthopedic concerns may be relevant; consider waiting until growth stops around 15–18 months
Owned large-breed male dogs who roam freely: population concerns outweigh orthopedic ones; neuter before 5 months
So yes, if you have a large-breed male dog who lives inside with you, there's a reasonable case for waiting a bit longer. That's a real, evidence-based nuance. It is not an argument for skipping it altogether, or for applying the same logic to your cat, your female dog, or your medium-to-small-breed male.
But What If Traditional Spay/Neuter Still Feels Like Too Much?
Here's something worth knowing, and something a lot of people — including people who care deeply about their dogs — genuinely don't know exists: traditional spay and neuter aren't the only options.
For male dogs, a vasectomy is a real procedure. It disrupts the tube that carries sperm while leaving all testicular tissue and hormones intact — similar to the human procedure. It prevents reproduction without eliminating testosterone. It must be performed under anesthesia, and few veterinarians are currently experienced in performing it, so it will typically cost more than a standard castration — but it exists, and it's worth asking your vet about.
For female dogs, an ovary-sparing spay is another option. Rather than removing everything, this procedure removes the uterus and cervix while leaving the ovaries intact, preserving hormonal function. It eliminates the risk of pyometra while maintaining the dog's natural hormones. Both ovary-sparing spay and vasectomy are approved by the American Veterinary Medical Association.
The honest caveats: these procedures are harder to find, cost more, and require a vet with specific experience. They're not accessible options for everyone, and they're essentially unavailable through most low-cost spay/neuter programs. And for female dogs who retain their ovaries, mammary cancer risk and heat cycles remain factors to manage.
But if the reason you've been hesitating is that permanent sterilization feels like the only option and it doesn't sit right with you — now you know it isn't.
Meanwhile...
While this debate plays out in comment sections, shelters are full.
The Coshocton County Animal Shelter and Humane Animal Treatment Association operates on a guaranteed annual budget of $23,000. As of right now, they've spent $19,234.28 on vet bills alone since the first of the year.
In the first seven days of May, they took in 22 animals. Two dogs — adorable, and filthy — were surrendered by a family that couldn't pay the $25-per-dog intake fee. The shelter ate the cost. Then they covered core vaccines, flea treatment, and deworming medications, and sponsored the transfer fees for both dogs. Hundreds of dollars. Two dogs. One day. And according to the shelter, that's just a Tuesday.
What I can tell you is that the animals I've been working to find homes for — Pauly, Bronx, Cookie Monster, and every dog before them — got there somehow. Sometimes through cruelty or neglect. Sometimes through circumstances nobody planned for. And sometimes through exactly the kind of scenario that showed up in my feed: two purebred dogs, an unplanned litter, and a comment section full of people excited about the mix.
The puppies from that litter may all find homes. I genuinely hope they do. But hope isn't a population management strategy. And every home a new puppy fills is a home a shelter dog didn't get.
The Bottom Line
Talk to your vet. Factor in your dog's breed, size, sex, and lifestyle. Ask about alternatives if the traditional approach concerns you. Read beyond the headlines. The evidence for spaying and neutering — on a thoughtful, breed-informed timeline — is still solid. The UC Davis studies don't say what people think they say, and the dogs waiting in kennels right now can't afford for that misunderstanding to keep spreading.
They're waiting. They've been waiting.
Source: Dr. Philip Bushby, "Deconstructing the Spay/Neuter Debate," Animal Sheltering magazine via HumanePro. Worth reading in full.
If this resonated with you — the nuance, the frustration, the genuine love for animals underneath all of it — you'd probably feel right at home in Bark Bits, the My Barking Life newsletter. Every issue covers the stuff that matters to people who actually care: shelter dog spotlights, advocacy updates, industry news, and the occasional take that might make you think twice. No spam. No noise. Just dogs, and the people fighting for them.
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