My 5 year ds has just come back from school with a bite mark on his shoulder which a boy in his class gave him in the playground (a friend of his). This boy is known to be 'challenging'! My first instinct is to talk to the teacher, but my ds told me he doesn't want me to tell the teacher because the boy is 'on his last warning' and he's worried the teacher will talk to his parents. I have pretty clear evidence that the father hits the boy when he's misbehaved, and I really don't want to be the cause of that. My ds is worried that the boy's father will 'whip' his son. What shall I do?