Cats' Body Language

It is uncertain whether Mr.Cat is in a flight or fight mode. His puffed up tail, arched back, and sideways position are indicitive of both, depending on the circumstances. Cats will assume this posture when frightened, but also when they are preparing to do battle, whether it be for real or in play fighting. Have you ever watched two young kittens play-fighting? They will face off in this position, then one will launch himself sideways onto the back of the other, and their rough-housing will begin.