Welcome to YorkieTalk, Sparky! You can also try some "Bitter Apple" spray. Or, use a spray bottle with water, and "spray" him when he's bites and give him a stern "NO!". Another tactic to use is pennies in a tin jar. Shake the jar with the pennies in them vigorously when he bites. Usually they hate that sound. He is probably teething right now, and he has a need to bite and gnaw. There are also some treats you can use for his teeth, such as Greenies or Nylabones. Good luck!
