Our 4 year old son's teacher called home today after school to tell us that he got into an argument with a peer over a toy. While pulling back and forth for the toy, our son bit the other child. This is not a normal behavior for him.
He was punished in school, although i am not sure to what extent. Should we be punishing him again at home? If so, what would an appropriate punishment for this sort of misdeed be?