Barbara has a VERY good point. "EVIL" is a human trait and it is being placed on an animal.

But I am not as optomistic as Karen, because the thought of attempting to place Ally into a home (by herself, with no other cats, even with experienced people) you are setting a ticking time bomb. SOMEONE is going to get hurt!

My best suggestion:

Get her into the vet. TELL them to handle her like a feral! EMPHASIZE that she bites without waning or cause! Then......have her examined for ANY possible problem causing her pain. Talk about using Prozac (and insist that you want the Prozac NOT the amitriptylin). ASK if putting her to sleep would be the best option! And go from there.

I think I can safely assume that many people, from this thread alone, will donate in order to get the vet tests needed to help Ally.