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My neutered cat mounts his brother. What Feliway helps? New kitten?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | neutered | 10 years and 3 months old | 11 lbs

I have 2 male, neutered cats, brothers and 10 years old. Casper has just started showing some sexual aggression. Today I caught him mounting his brother, Tippy. I'm considering trying a Feliway diffuser. Unfortunately, I've found there are many kinds and would appreciate your opinion on which type of Feliway diffuser would be best to control this type of behavior. We are also in the process of adopting a 6-wk old female rescue kitten, should we reconsider this until the problem is resolved??

1 Answer

Most Helpful Answer

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Answered By Lindsey Edwards MVB, BSc, IVCA

Veterinarian

Published on August 7th, 2018

Such behavior can be a dominance issue and in older pets may be a sign of changing social dynamics and i would schedule a vet check to rule out any medical causes. The comfort zone diffusers for multicat household or the original feliway pheromone diffuser may help but i would not introduce a new kitten until things settle down

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