Hello everyone! My boyfriend and I are in desperate need of help. We adopted an older cat named Felix who we have had for a bout a year, he never shows aggression or any kind of violent behavior. He was a lazy old chubby cat. My boyfriend brought home two kittens home that we have put in a spare bedroom for now. However, Felix has started to violently attack my boyfriend and I and any person who walks in our door. He attacks multiple times leaving deep wounds on both of us. To the point we have to lock ourselves in our room till he calms down, if he does. he has become unpredictable and scares myself and everyone else. I know he's upset and jealous so we left the kittens the spare room till they get use to the smells but him attacking us violently and other people is beyond me. I know he's upset and jealous that we got another kitten or two. But he corners us and attacks! Please help us