-If the cats are not normally friendly to each other, then the wrestling behavior is probably aggression, and not play. Sometimes the cats are testing the waters with each other and the behavior is a display of one cat trying to solicit play from the other so you have to watch the reaction of the other cat.
-During play, cats take turns being the mock aggressor. So if one cat is repeatedly in the offensive position, then it's probably not play.
-During play, claws remain sheathed.
-If there's growling, screaming, or hissing, then it's a battle and not a play session.
-Evidence of tufts of hair or signs of blood indicates aggression.
-If the cats involved are unneutered adults, then the wrestling is aggressive.
-If the cats avoid each other afterward, then it wasn't playful.
If you suspect that your cats are involved in an aggressive wrestling match, don't try to separate them with your hands. Instead, make a noise to distract them so you can remain at a safe distance.
If the behavior is ongoing, do some behavior modification to help the cats feel more relaxed around each other. Offer each cat treats in the presence of the other so they start associating each other with positive experiences. Also, make sure there's enough space for each cat - that means providing more than one litter box, more than one feeding station, and plenty of areas for perching and playing.
Note: this article is not intended to diagnose or treat your cat's behavior problem. If your cat is displaying a change in behavior, please contact your veterinarian in order to rule out possible medical causes.
