I have 5 cats, but 2 of them (both girls) are very aggressive towards the others. I'm a bit worried because they keep beating up on my kitten... So far she's got a torn ear, a chunk out of her leg, several scratches, and very uneven fur. I locked them into my room to avoid trouble, but is there an easier way? :( Anything would be helpful. (btw, I've tried both of them on calm medicine, with no results.)