Well Bijou is a Shih-Tzu and is about the size of a baby and when he is around people hes all excited and when he is playing he isn't usually mean but yesterday my dogs were playing and pontouf my other shih=tzu i dunno maybe hurt him so he got mad and he went strainght at her and made a scream bark and just bit her and she was yelping when we take him to the vet the vet says that theres nothing wrong with him so my parents say to just when he raises his lip that is a sign to back off my unfortunetly my other dog doesn't understand that so what shou ld i do???????? oh yeha you asked me what do i do when he bites i yell BAD DOG and tap his nose and he goes in his corner and he knows he did wrong but if you try to get clse to him after you bit him i swear he will bite your head off!!!