Amos is bad with kids… really bad.  He’ll generally growl at small children and has once lunged at a two-year-old, barely grazing the girl’s hand.  Soon after that incident, I bought him a muzzle and occasionally make him wear it at parks, so he doesn’t associate it with punishment.  Usually, for at least ten minutes, he’s concentrated on trying to remove it.  Sometimes he even gives up walking and just lays down, acting sad.