I know that biting is normal for puppies but the last couple of days it seems like our pup is getting pretty aggressive with it. If it was just me I wouldn't really care but with my youngest daughter (3 yr. old) I am kind of concerned. We always supervise their interaction but he his pretty quick and has already gotten her good a couple of times. I am almost to the point of not letting her spend any time with him until he grows out of this stage. Any suggestions?