[FirstYorkie]

Oh, one more thing that I meant to add. Clear roll-on deodorant works wonders on surfaces that you don't want chewed. Great for book shelves, baseboards, etc.

I personally wouldn't try to "snap" back at my dog. It's likely to increase rather than decrease aggression in many dogs. When I was nipped, I would immediately break eye contact, stand up and turn my back. Be consistent. Pup will soon learn that nipping gets the opposite reaction of what he wants. If you don't feel that is aggressive enough for you, I'd go with the time-out suggestion.

Good luck!