Dog Spay and Neuter: UC Davis Guidelines
Assisting Decision-Making on Age of Neutering for 35 Breeds of Dogs: Associated Joint Disorders, Cancers, and Urinary Incontinence
Benjamin L. Hart1*, Lynette A. Hart2, Abigail P. Thigpen2 and Neil H. Willits3
University of California, Davis, Davis, CA, United States
Neutering (including spaying) of male and female dogs in the first year after birth has become routine in the U.S. and much of Europe, but recent research reveals that for some dog breeds, neutering may be associated with increased risks of debilitating joint disorders and some cancers, complicating pet owners’ decisions on neutering. The joint disorders include hip dysplasia, cranial cruciate ligament tear or rupture, and elbow dysplasia. The cancers include lymphoma, mast cell tumor, hemangiosarcoma, and osteosarcoma.
Here are the specific suggestions:
What is the recommended age of spay for a 30lb Shetland Sheepdog?
For a 30 lb Sheltie, we generally recommend waiting until about 12 months of age before spaying. It may help support healthy joint development.
Thanks so much for this info as my dog is scheduled for tomorrow! Was going to cancel when you mentioned border collies were a year, but came here and saw shelties were anytime on this chart so keeping the appointment and feel much better about it.
Shelties did not show the same concerns seen in some other breeds, so it sounds like you’re making a well informed decision. Wishing your pup a smooth procedure and a quick, easy recovery.
Thanks so much. My bitch has had 2 cycles at 12 months. I recently went to an RSPCA open day for a free microchip. They tried to bully me into having my dog desexed, when I told them about these studies and how it affects our dogs having them done too young she shut up because she knew I was informed. I like the way they just presume everyone is an irresponsible pet owner.
It is important that pet owners have the information they need to make the best decision for their own dog. The UC Davis research shows that the ideal timing can vary by breed and size, so there is no one size fits all answer. We’re glad you felt confident asking questions and advocating for your girl.
Why is the Doberman Pincher the only breed to be left intact?
Dobermans are not the only breed. The UC Davis research found that several breeds may benefit from delaying or avoiding early spay or neuter because of a higher risk of certain joint problems and cancers. We always recommend making the decision based on your dog’s breed, age, and individual health.
Purebred Bichon puppy. Male. Is 6mo too early?
For a male Bichon, 6 months is often appropriate, as small breeds generally mature earlier and are not among the breeds shown to benefit from delaying neutering. We still recommend chatting with your veterinarian, since every pup is a little different.