Non-Recognition Aggression in Cats: A Case of Forgotten Identity

Your two cats are best friends. They play together, groom each other, and sleep curled up with each other. Then one day, you take one to the vet’s for a check up. When you return from the clinic, instead of receiving a warm welcome, the cat who stayed home hisses and attacks the other cat. Your two former best friends have turned into sworn enemies, and your formerly peaceful home has turned into a battle zone.

Aggression between cats is always a distressing problem for the cats and the humans...