I remember the first time I went away for the entire day after we had gotten Kimba. I expected to come home and find fur EVERYWHERE! Nope. Two of them were on the couch and the other was close to them on the cat tree. No signs of a fight anywhere, until they knew we were home and then the growling and hissing began. KKK, boys can also growl and hiss at the mere sight of another cat from across the room. Cats, go figure.