Fighting in Cats

Why do cats fight?

Cats can be very territorial, and inter-cat aggression is common among household cats as well as cats who live close to each other. Males are more prone to territorial fighting than females, although it is also possible for females to fight, and males and females to fight. It all comes down to the cats and their personality. My experience has been that of male to male fighting. Some households will never experience fighting at all.

Cats who roam outdoors are much more likely to become involved in cat fights. Either by wandering into a neighbouring patch that has another cat or a cat encroaching on your cat’s territory. We’ve all heard the caterwaul late at night.

There are several risks your cat is exposed to when he engages in fights. Not just injury from bite wounds and scratches, but he also becomes exposed to cat diseases such as feline leukemia virus and feline immunodeficiency virus (FIV/cat AIDS).

How to safely break up a cat fight

Never, ever get between two cats having a cat fight. You risk severe injury in doing so. Cat bites and scratches frequently become infected, and it is just not worth the risk.

If you do need to break up a cat fight the safest way to do so is to throw a blanket or towel over the cats or use a broom to separate them.

Be aware that cats will be very wound up after a fight, and you are still at risk of being bitten or scratched after the event. Give your cat(s) time to calm down before approaching/petting them.

How to reduce the risk of cats fighting

  • Desexing all cats will go a long way to reducing fighting among cats. Entire cats are considerably more territorial. That’s not to say that desexed cats don’t fight at all, they do, but desexing cats will undoubtedly reduce the incidence of fighting.
  • Don’t have too many cats. The more cats you have, the higher the chances of fighting among cats.
  • If you have one cat and plan to get a second, seriously consider getting one of the opposite genders. If you already have an alpha cat, it is easier to introduce a kitten to the house than an adult cat as younger cats will be less of a threat to the already established cat in the household.
  • Discourage neighbourhood cats from coming onto your property.
  • Keep your cat(s) indoors or in an enclosure, which reduces their exposure to other cats from the area.

Fighting among household cats

Inter-cat aggression is a common problem and a significant cause of concern when it occurs. I have had multiple cats over the past 20 years, most of whom get along just fine, but sometimes you will have cats who don’t like each other.

Ways to reduce inter-cat tensions:

  • Make sure each cat has enough space and don’t have to share resources. Are there enough litter trays, beds, cat trees, toys, different feeding stations?
  • Use Feliway diffusers which contain synthetic pheromones which are calming to cats.
  • If you have two cats in particular who can’t get along, you may need to separate them and re-introduce them, slowly. Confine each cat in a separate room for several days. Keep their water bowls and bed with them. After several days, swap cats over so that cat a is in cat b’s room, cat b is in cat a’s room. Take a blanket or item of bedding from each room and wipe it down on the other cat. So, take a blanket from cat a’s room and wipe it over cat b, a blanket from cat b’s room and rub it over cat a. This is to transfer scents between cats. Do this for a few days. Now it’s time to re-introduce. Bring the cats out, in cat carriers. Leave them for a few minutes. Let each cat nibble on a treat while he is in his carrier. Slowly open the carrier doors and let the cats come out. Now is the time to be diligent. Talk calmly to your cats, let them explore, sniff the area. Continue to give the cats small treats and reassure them. If a fight erupts, return the cats to their separate rooms (remember, never physically get between two fighting cats, you will get injured), and try again in a few days. After 30 minutes, return the cats to their respective rooms. Continue the re-introduction over several days, gradually extending the amount of time the cats are out.
  • If you have one cat who is especially aggressive/dominant over other cats and the above methods haven’t helped, it is a good idea to speak to your veterinarian who may recommend drug therapy for your cat.
  • In some cases where despite all your attempts, the cats continue to fight, it may be time to consider rehoming one of them. I know many will say that a cat is for life, but sometimes two cats just can’t get along. We had this situation several years ago. Two very alpha males in the household, who incidentally left all the other cats alone (we had five at the time), but they fought and sprayed constantly. One cat was also aggressive to humans, so rehoming him was out of the question. Nicholas, a gentle-natured boy went to live with a friend where he was an only cat. Both cats stopped spraying when they no longer lived in the same house. Rehoming was not an easy choice to make. Nicholas was a one in a million cat, but it was the best choice in a difficult situation. He was happier on his own, and our other boy was happier without a second alpha male to stir things up.


  • Julia Wilson, 'Cat World' Founder

    Julia Wilson is the founder of Cat-World, and has researched and written over 1,000 articles about cats. She is a cat expert with over 20 years of experience writing about a wide range of cat topics, with a special interest in cat health, welfare and preventative care. Julia lives in Sydney with her family, four cats and two dogs. Full author bio