I have had this kitten since she was 3 and half weeks old. She has always seemed to bite a lot and we thought she just had a behavioral problem. But we have noticed her chewing on metal, plastic, and other hard items. At times we will gently rub the sides of her mouth and she seems to act as though it helps like shes in pain. She has her canines but the bottom ones almost look as though they are not formed right or had a piece chipped off. Does anyone have any idea why this maybe?