i know everyone, one more! is it ok that he is barking at me and trying to bite me? not hard but like he would bite a nylabone? I'm wondering if it's because he's so young? i'm not quite sure what to make of this. if i call him he'll come running all that way to me and then stop. then i try to pet him and he either tries to play bite with me or barks only, then runs off. is this normal for this age?