I'm trying to figure this one out. I have two 5 year old males neutered, brought up since kittens. I introduced a 9 month old female spayed, to the household almost two years ago. We did the whole careful introduction, and everything got off quite smoothly. She really is mommies cat and has quite an obsessive clingness to me. For about the last 4 months, she has become very domineering with the other two. She will chase them off the bed at night, having to be the first on the bed. If I pet one of the other cats, as soon as I'm finished she will attack it, biting it on the head or legs. If I cuddle her when she doesn't want to cuddle...she attacks her brothers. So far they will just hiss and growl but be the ones to move away, but it's becoming tiresome to have them constantly pounced on for what seems like no reason. Since they are all indoor cats, I really can't think of anything that has changed to provoke this behaviour all of a sudden.She came from a feral colony and in the colony she used to be bullied terribly and she was the most submissive cat of the whole lot. But, she has been living in the lap of luxury for the pass 20 months. Have I spoiled her with too much attention and am now reaping what I have sown??? Any ideas of how I can handle this?