You did not say how old he is. If he simple enough for a basic obedience class then I would strongly recommend that.
I also agree with a distraction chewy toy if that can help.
Good luck to you!
Does the pup get left for long periods of time?
__________________ .   Cali  , and Cali's keeper and staff, Jay No, not a "mini" Yorkie - She loves to motor in her Mini Cooper car  |