Hi, I have two boy cats that suddenly changed personalities overnight. They are littermates that I have had since they were kittens. They're a little over two years old now, and in all the time I've had them have never shown any sign of aggression toward each other. At worst, they would play and get too rough, but I could always tell it was nothing more than play and they would be grooming each other a frew minutes later. They've always been inseperable, sleeping together and playing together.
As of today, they are extremely aggressive toward each other. My boyfriend was bitten trying to separate them, which has never happened before, and there is fur all over my apartment. It got so bad that I had to put them in different rooms. One of the cats is acting stranger than the other, he seems to be the one initiating the aggression and now that they are separate he is yowling and breathing the air in through his mouth.
I think one of the causes might be the neighbor's cat. She went into heat a couple of days ago. The thing is, my cats are neutered and have been since they were 5 months old. Could it still cause aggression this extreme? What are the signs of hormonal aggression in cats? Could it be something else?
As of today, they are extremely aggressive toward each other. My boyfriend was bitten trying to separate them, which has never happened before, and there is fur all over my apartment. It got so bad that I had to put them in different rooms. One of the cats is acting stranger than the other, he seems to be the one initiating the aggression and now that they are separate he is yowling and breathing the air in through his mouth.
I think one of the causes might be the neighbor's cat. She went into heat a couple of days ago. The thing is, my cats are neutered and have been since they were 5 months old. Could it still cause aggression this extreme? What are the signs of hormonal aggression in cats? Could it be something else?