I woke up at 4am to a god awful fur flying knock down drag out fight in my living room. For two days since we have had the cats they have seemed to get along fine, but now they are stalking one another. They aren't hissing or growling but are rolling one another all over the floor and making typical cat fight howls. I broke it up and separated them. Got up this morning later and they are at it again. I dont know if they are playing or not but neither one will give it up. If Sam tries to walk away, Sally goes after him, and vice versa. I dont want them to hurt one another and they arent declawed. I've never had two full grown cats in the house at one time getting used to one another so Im not quite sure how to react with all this any opinions would be helpful and have noticed if I get crabby with them, Sam (who is still not being overly affectionate anymore) goes sulking off to the basement with this "nobody loves me anymore" look. I have read alot of the other posts about cat fighting, but most of them seem more aggressive than what mine are being. I guess my real question is how far do you let it go and how do "big cats" play?