At what age should I spay or neuter my puppy?
Answered by our veterinary team
The optimal age for spaying or neutering has become more nuanced as veterinary research has expanded. Here's the current evidence-based guidance:
Small breeds (under 10kg)
Spaying or neutering at 6 months is generally safe and still recommended. These breeds don't have the same hormone-dependent musculoskeletal development concerns as larger dogs.
Medium breeds (10–25kg)
6–9 months is the typical recommendation. Some vets may suggest waiting until 9–12 months.
Large and giant breeds (over 25–45kg)
Multiple studies - particularly from UC Davis - have shown that early neutering in large and giant breeds is associated with significantly higher rates of joint disorders (hip dysplasia, cranial cruciate ligament rupture) and certain cancers. For many large breeds, waiting until 12–24 months may be beneficial.
Female dogs
There is also a trade-off to consider - early spaying before the first or second heat cycle offers the greatest protection against mammary tumours, but the joint health research complicates timing for large breeds. Your vet can help you weigh the benefits and risks for your specific dog.
Key takeaway
This is a decision best made in consultation with your vet, taking into account your dog's breed, size, sex, lifestyle, and any breed-specific health predispositions.
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