A.W.
NEVER bite back! Doing this to a child will only confuse him. It's wrong to bite, but you're doing it?
Consistant loving discipline. Immeditly seperate the child from the other children. Sit him down in timeout. Explain to him why he is there, and then leave him alone--away from the other children and adults but always within supervision--for a couple of minutes. It is the best method of correction and the worst possible punishment to them. Children hate being excluded. when the time is up go back and explain to the child agin why he was in time out and then have him apologize to the victim.