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Why are my male cats fighting and losing hair? What can I do?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Female | spayed | 3 years old | 10 lbs

My two male cats have been fighting (I think), and no they each have a patch of hair missing. I am fearful that this behavior will escalate and that they will harm one another permanently. They have been together for 2 years and this is the first time that this is happening. Is this behavior normal? What can I do to stop this behavior before it goes too far? ChaCha (Black, 2yr old) Sol (Tabby, 3yr old) Photos attached are of the wounds/ missing hair patches

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1 Answer

Most Helpful Answer

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Answered By Rodrigo Roca, DVM

Veterinarian

Published on August 9th, 2018

Hello, sorry to hear about your kittens. It is difficult to evaluate from the photos if those are fighting scars/scabs and hair loss, or areas of hair loss from another unrelated cause. Other things that may cause this hair loss and scabs may be something that is making them itchy. Common things in indoor cats include allergies and infections with parasites, bacteria, or ringworm. If these areas do not improve then have her evaluated by her veterinarian soon to make sure that this is not associated with some form of infection or allergies. It this is indeed associated with fights the read the following information and monitor the areas for any swelling, pain, discharge, loss of appetite, vomiting, and lethargy and have them evaluated by their veterinarian if you note any. Its rare that cats whom have been roommates for an long period of time develop inter-cat aggression. Factors that could contribute to this rare occurrence include moving to a new place, obtaining new furniture, a new pet, or even changing the fragrance of either cat. Other causes include if one of your cats was at a different location (for example the vets or groomers) then came home with a different smell. Most of the time, the aggression between cats is evident and constant. If you are not seeing any aggression or even hissing between them, and you did not witness a fight, then its likely that those areas are not from fighting. Hope this helps and best of luck.

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