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My neutered cat acts male and tries to mate. Is he still fertile?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | 3 years and 6 months old

I am wondering if a vet can still perform a neuter without finding both nuts? I was not informed that only one nut was found, my cat got fixed when he was 5/6 months old, he still displays male behaviour, he sprays in the box (I occasionally smell a strong odor when cleaning out the box, but not every time I clean)he tries to get outside constantly, doesn't meow around the house tho. I caught him one time trying to mate with a female we are fostering.. should I be concerned that he is fertile?

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on September 18th, 2018

You need to go back to the vet who did the neuter and ask for the surgery report which should say whether only one testicle was removed or both. You can also have your cat tested (blood test) for hormonal activity which will then show whether he has a hormone-producing testicle left. If that is the case, I would go back to the original vet and ask him to remove the retained testicle. If he only removed one testicle he should have informed you and also told you that your tom was not neutered. Retained testicles can become cancerous as well.

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