Sweet dog or Rotten son.

I have a very loving dog and a rotten son. My kids had some cheezits in a bowl.  My dog was trying to eat them. My son knocked him out of the way and got to them. Then my son headbutts the dog. Instead of growling like most dogs would he just moves aside and my son eats some then give the dog some as well.  My son it is rotten and my dog is sweet!!