I had a cat once that would attack you for no reason. And I don't mean the playful attack, either -- my younger sister has scars on her legs from attacks from this cat. She did nothing to provoke it either, just walked across the family room nowhere near him and he would run and attack her legs. It happened to others, too, my sister just got the worse of it.

I came home from work one day, and he was gone. My mother says she dropped him off at the shelter.

So... I know this doesn't help you and my sister didn't go to the hospital because of her injuries but we went through a similar situation.