Answer-first
When should I spay or neuter my cat?
Veterinary guidance (Cornell): spay or neuter at three to six months, and spay a female before her first heat — early spaying virtually eliminates later mammary-cancer risk.Fact
This page helps you decide the timing conversation with your vet. The surgery itself — anesthesia, technique, your individual cat's fitness — is your veterinarian's call.
Applies to: Healthy kittens and unaltered adult cats. Timing for a specific cat (weight, health, breed program) is set with your vet.
Steps
Why 3-6 months (female)Fact
- Spaying before the first heat virtually eliminates mammary-cancer risk later in life
- Prevents pyometra, a potentially fatal uterine infection
- Cats can reach puberty and become pregnant surprisingly young — waiting 'until a year' risks a litter
Why 3-6 months (male)Fact
- Neutering removes the hormones behind roaming, fighting with other cats, and urine spraying
- Behaviors like spraying are much easier to prevent than to undo once rehearsed
What this page does NOT decideProfessional guidance
- Whether YOUR cat is fit for surgery on a given date — that's a vet exam decision
- Anesthesia protocol, pain management, recovery instructions — follow your clinic's guidance
- Adult cats: it's not too late; your vet will advise timing
Normal vs keep-watching
Normal: Clinics commonly schedule spay/neuter alongside the kitten vaccine series in the 3-6-month span.
Keep watching: If unaltered: heat behaviors (calling, rolling), spraying, roaming attempts — bring these to the timing conversation.
When to contact a vet. Surgery questions, post-op concerns (lethargy beyond the clinic's stated window, wound changes, not eating), or an unaltered female showing possible pregnancy belong with your veterinarian — this page never replaces the pre-surgical exam.
What changes this answer
- Shelter adoption (often already done before adoption)
- Breed-registered breeding cat (different plan entirely)
- Adult intact cat (still beneficial; vet advises)
Common mistakes
- Waiting for 'one litter first' — no health benefit, adds risk
- Assuming an indoor cat can't get pregnant
- Treating male neutering as optional because 'he seems calm'
Sources
- Cornell Feline Health Center (veterinary academic; tier 1) · Tier 1 · verified 2026-07-21
Real questions cat owners ask
- Can a 4-month-old kitten really get pregnant?
- Will neutering change my cat's personality?
- How much does spay/neuter cost?
Record neuter status and date in your Passport profile — feeding and health tools adjust for it. Set up your Cat Passport.