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Why is my cat aggressive to family and fighting our other cat?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 2 years old | 7 lbs

My cat found another home to live. He stays there for the whole day and he is coming back to sleep only. He is very aggressive to our family members and I spoke to the lady where he stays and she told an that he is friendly with them. We have got another female cat and they were very good togheter before but know they are fighting. I'm not sure what I should do in that case

2 Answers

Most Helpful Answer

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Answered By Elva Ma DVM

Veterinarian

Published on December 12th, 2017

I'm sorry to hear your cat isn't doing well in your home anymore. If you have enough space in your home, you could try separating the two cats temporarily with a gate while we try to re-introduce them again. Feliway Friends is a cat pheromone spray which can help cats get along better. I see you live in Poland, perhaps you can try your local vet or purchasing it online. You can have them eat side by side, but with a gate between them. That may help them get used to each other's scents and start to associate their interactions with something positive (eating). Make sure that you have separate food and water dishes for the two cats, and at least 3 litter boxes in the house. Take it very slow and don't be too rushed to introduce them again. As much as we try, two cats may never get along but we can at least try to have them be civil toward each other! Best of luck!

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    Answered By Amber W

    Veterinarian, Certified Veterinary Acupuncturist

    Published on June 30th, 2018

    I'm sorry to hear you're having an issue with your two cats. The first step to take is to completely separate your cats when you are not home to keep everyone safe. It's also a good idea to have separate resources for all the cats in the household. So this means separate water and food bowls for each cat. Also, for a two cat household, 3 litter boxes are recommended. Finally a Feliway diffuser may help reduce tension in the household. A few tall cat towers can also help the cats to have their own private areas but you should only allow them together when they are directly supervised. Sometimes when one cat shows aggression toward another cat it can indicate a health issue in one or both of the cats. It would be a good idea to have both Onyx and your other examined by your veterinarian to rule out health issues. Thanks for using Petco Pet Education Center, formerly Petcoach and best of luck to you!

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