You're welcome, Megan! It is so important that we continue to support evidence-based recommendations proven to improve individual animal health and animal welfare in general, including routine S/N, as well as the HQHVSN surgeons providing those services.
I am re-sharing another post I made in the Maddie's forum a few months ago below. For more discussion about the possible implications of reduced S/N or gonad-sparing procedures, I would point stakeholders and veterinarians to the ASV's published, consensus statement regarding recent recommendations to delay or eliminate routine S/N here: https://jsmcah.org/index.php/jasv/article/view/120/271.
There are a handful of deeply flawed studies that have purported to demonstrate correlation (CAUSATION has never been documented) between pediatric S/N and a number of health conditions (mostly cancer and orthopedic disease) in dogs. I say deeply flawed in that they are limited to purebred dog breeds already known to be at increased risk for these conditions, are based on skewed data from tertiary care facilities (referral hospitals/university vet schools) or owner surveys without medical records, and demonstrate (at most) a small (sometimes not even statistically significant) increase in risk. There are a number of other weaknesses and flawed methodology that I won't bore the group with unless requested. On the flip side, we know for sure that dogs that are not S/N are at high risk for a number of potentially fatal diseases such as pyometra, mammary carcinoma, prostate cancer/adenocarcinoma, dystocia, TVT, not to mention the associated behavioral problems that are common reasons for surrender to shelters. Also, while there are no studies that demonstrate increased risk of S/N in mixed breed dogs, there are a number of studies from multiple countries that find that S/N dogs are overall healthier and have longer lifespans than intact dogs.
The other issues with these studies and the push to delay or eliminate routine S/N in dogs are the socioeconomic ones...when S/N is delayed until maturity, the costs for these procedures increase dramatically, particularly for large and giant breed dogs. I have seen quotes for >$2500 for routine S/N in large dogs...well out of reach of many owners. When these dogs develop pyometra or become pregnant and have complications such as dystocia, spay becomes an emergency procedure with quotes as high as $10-15,000+ for surgery and hospitalization. When these dogs develop behavior problems associated with reproductive hormones (roaming, marking, aggression, bleeding/house soiling during estrus, etc.) they are at risk of becoming lost/stray or surrendered to shelters by frustrated owners.
My shelter has seen a significant increase in intake of dogs that are intact, both stray and O/S. In 2019, 20% of O/S dogs and 50% of ADULT stray dogs were intact. In 2024, those numbers have jumped to 40% of O/S dogs and 70% of strays. When we offer FREE S/N to owners when they reclaim their stray dogs, they are increasingly declining S/N (even for adult dogs) because they have "heard that it is bad for them". There are real implications to this trend for shelters that are already full to bursting with large-breed dogs, many with behavioral barriers to adoption.
While I respect an owner's right to make choices regarding S/N for their individual pet, I don't think most people actually understand the risk/benefit analysis. And we in the animal welfare/shelter world should consider these evolving recommendations and their implications for the work we do and the communities we serve carefully and thoughtfully.
The implications for novel, gonad-sparing procedures carry additional implications for shelters, and are NOT supported by any studies demonstrating improvements in individual animal health, animal welfare or access to care issues. Just for one example, proponents for these alternative procedures acknowledge that, due to the high risk for disease related to retention of gonads, those pets require lifelong, regular screenings for those diseases, including abdominal U/S and other expensive procedures. If shelters performed gonad-sparing procedures, would every animal need to be adopted out with these recommendations at a time that many people are reporting an inability to pay for or access even basic veterinary care? That would be a significant barrier to adoption for many. That's just one of a bunch of considerations that need to be considered as part of the equation!
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Rachel Powell DVM
Director of Surgery
Greenhill Humane Society
Eugene, OR
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Original Message:
Sent: 09-04-2025 08:34 AM
From: Megan Whitworth
Subject: Ovary Sparing Spay (OSS)
Thank you so much for this. It's definitely a difficult conversation to have and explain to adopters. While we cover the remainder of puppy vaccines in our vaccine clinic, and their spay/neuter at one of partner clinics, they are of course getting their new pup situated with their own veterinarians that are recommending to wait. It's hard not to doubt ourselves or our approach, because ultimately we do all want what's best for dogs, and this is very helpful to my heart and my brain as we continue to navigate. The implications for continuing to wait for over a year go far beyond the one pet the adopter has, but explaining that to them isn't an easy conversation ha, nor is pushing back on the recommendation from their personal veterinarian who isn't engrained in shelter medicine or the rescue world. I sincerely appreciate your thoughtfulness, realness, and passion behind this answer and the understanding.
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Megan Whitworth
Director
Puppy Haven Rescue
OK
Original Message:
Sent: 09-03-2025 04:37 PM
From: Rachel Powell
Subject: Ovary Sparing Spay (OSS)
While there is chatter about "alternative", gonad-sparing procedures for sterilization, it is important to note that there are NO long-term studies into the benefits or risks associated with these procedures, so any recommendation for consideration (on demand) for or widespread adoption of these procedures by veterinarians or shelters is extremely premature. We do know that gonad-sparing procedures leave pets at increased risk for stump pyometra and ovarian/mammary carcinoma in females and testicular/prostate cancer and behavioral problems (like inter-animal aggression, roaming and urine-marking) in males. Risk for those diseases and behavioral problems are far higher and more life-threatening than a cruciate rupture or sl. increased risk of a rare cancer.
The short answer for adopters, IMO, is that routine S/N, including pediatric S/N, is supported by all major veterinary organizations (AVMA, AAHA, ASV, AAFP) and is proven to be safe, efficient, and at low risk for complications. The studies finding increased risk for orthopedic problems or increased risk of certain types of rare cancers have all been conducted in purebred breeds (mostly large or giant breed) at tertiary care facilities that are not representative of the general population of dogs and results should not be generalized. If adopters wish to pursue "alternative" procedures for their pets, they should plan to acquire their pets from somewhere other than a shelter.
This is an issue I am passionate about so happy to say more if needed...
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Rachel Powell DVM
Director of Surgery
Greenhill Humane Society
Eugene, OR
Original Message:
Sent: 08-30-2025 10:50 PM
From: Alana Hastings
Subject: Ovary Sparing Spay (OSS)
Spay/Neuter too early! Boy this is a hot topic! Recently we have had a run of possible adopters who have voiced concern about spay/neutering before a year. This brings our adoption process to a halt but we try to meet in the middle, and ensure no animals are adopted before being spayed/neutered. One family recently wanted a veterinarian to perform an Ovary Sparing Spay (OSS) to ensure the puppy was healthy and still had her ovaries. Has anyone utilized this surgery? What are your thoughts?
#Medicine,SurgeryandSterilization
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Alana Hastings
Co-Founder
Mendo Shelter Pets Rescue
CA
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