I have a foster cat (Bonnie). She came to me as a pregnant outside cat. She has come a long way in the friendly department. (she has been here a bit over 2 months) Here is her problem (the one that might prevent her from finding a home). She bites when she gets excited. Not viciuosly. It is usually when she plays or after you've pet her for a while. I have been telling her "NO biting" and getting my hand away from her. But I want to be able to teach her NOT to do this so that when she goes to a new home she doesn't get returned with the lable "NASTY". HELP