My 11 week old passes all temperment tests that I've found on this forum. However, he'll exhibit extreme aggression when he's in the mood to chew. He leaps in snapping at my face, ears, hands, arms, chest, anything. After I tell him "NO!", he barks sharply and continues lunging at me. The only surefire way to stop him is by sticking and holding a chew bone in his mouth. If I continue to hold the bone he'll chew on it for 5-10 minutes which regresses his chewing urges and causes him to return to his relatively docile state.
What do you guys think of his behavior? He displays absolutely no aggression when I grab his food, water, toys, etc. but his urge to chew on my face is quite bothersome.