So Tucker is 10 months old and is normally a really well behaved dog but he has a biting problem. He loves to have his belly rubbed but even when I do that he thinks he has to be chewing on my hand and this has been an on going issue but when I start to fuss at him he darts off like a mad man and will come back and bark and do it again. I don't know what to do. And when I call for him to come he doesn't do that either. But yet he knows all kinds of tricks and listens when he wants to. Have I done something wrong to make him behave this way or is he just trying to test me? PLEASE help. I want him to be a well behaved dog!