Hi all! I adopted a cat about 2 years ago from the Humane Society. He is a great cat with lots of energy and loves to play! He can be a bit aggressive at times though. He was a stray before the humane society got him, so my diagnosis is that he just doesn't know how to play nice. He has become part of the family and we love him dearly, just have one concern. Whenever he becomes agrivated, he bites his right heel. I have never heard of this before and looked at many different websites and can not find a thing about it. If anyone has any idea on why he is doing it or how to stop it, PLEASE let me know.. Thanks!!!