I have this problem too, I have one cat that leterally stalks my other cat, looks for him, (he is deaf) so he never hears her coming, then she swats at him and trys to start crap. Of course he has learned to run away. Several times she has drawn blood. So I started putting her in a cage everytime she did this, she would howl and howl, i would just tell her she was not nice and leave her there for awhile. Then my grandson came to town, and she or I should say all of them have hidden away, awiting his departure And she hasn't attacked anyone.

Also I have tried to give her, her OWN special time with me. I think this has really helped. In the morning before work, she is the ONLY one allowed to come in the bathroom with me to get ready. Makes her feel more superior, and she does. So i assume that her problem is sharing me.