today i used the tin can with coins in it and i found it VERY effective. everytime he would bite me or get vicious i would rattle the tin can and say NO BITE. he would back up and look at me and tilt his head like whats that?.. after a few times all i had to do was reach for the can and he would stop. by the end of today all i had to say was NO BITE and he would look at the can and stop biting. i was soooo proud of him. i want to thank you for the idea!