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My male cat is acting out. When can I neuter him and get vaccines?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 6 months and 29 days old | 13.6 lbs

Hello. I think my cat is in heat. His behaviors got weird. Today he got really angry at me, hissed at me and tried to scratch my face. We are sitting at 3rd floor and i am afraid he might jump from the balcony. I am keeping it closed but he can also escape from the door. I was wondering when should i neuter him? Is it okay to neuter him when he is still in heat? If not, how much should i wait? He didn't got his rabies and leukemia vaccines yet. Is it okay to get them after he is neutered? Thanks

1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on March 30th, 2018

Male cats don't technically go into heat (that is more a female thing). They do however, become sexually mature around 6 months of age which means they are now interested in mating and can actually impregnate a female. Cats can be neutered as early as 8 weeks of age but most vets wait until at least 4 months of age. Yuki is definitely old enough to be neutered and based on his behavior you described I would do it soon. There is no male "heat" cycle so he can be neutered anytime now. Whether or not the vaccines should be done before or after is up to your vet. Some vets require the vaccines to be up to date before they will do surgery so ask your vet about that. Hope this helps. Best wishes.

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