Is there any room in the house where she could be an "only cat" until you find her a new home?

Any elderly folk in your church or neighborhood that might take her as an "only cat"?

That's all I can think of besides drugging her into submission, which is an awful alternative.

I wonder what has caused this turn in her behavior, but there's no way of knowing for sure.

Poor you, poor sweet Bunny Butt, I don't know what else to say other than offer my sympathies.