One cat harassing others
Me and my roommates recently moved into an apartment all together, and we brought our cats (roommates brought 3, I brought 2). One of my two cats was absolutely horrible to the others, she would hunt them down every time she left my room, and eventually I asked my mother if she would take her, which she agreed to. She does not want to take my other cat, however, and I know he wouldn't be happy with her either.
For the most part, he is good, and while he hated all the people at first he has grown to be very sweet with all of them. He cannot seem to get along with the other cats, however. Most of the time he ignores them and is fine, while they all hiss and growl at him whenever he's around. But every once in a while, he chases them down and attacks one of them which results in a lot of screaming from the other cats. 311
This is absolutely not playing on his part. When he does this, I lock him in my room, which he hates more than anything else in the world.
For reference, he's around 10, and the cat he has the most trouble with is another male around 10. There is also a 4 y/o female who growls and hisses at him 24/7, and who he chases sometimes, and then a 1 y/o male who he mostly gets along with, except for rare occasions where he chases multiple cats.
I'm just at a loss about what to do with him. He's incredibly attached to me and my girlfriend and my mother doesn't want him at all. On top of that, he cries and cries whenever he's locked somewhere so it would be cruel to keep him in my room at the time. We have also tried a feliway diffuser, which has been active for about a month and a half now. 954