TIP #1: TUG FOR EXERCISE AND STIMULATION
Tug is a terrific game to play with your dog to relieve anxiety and boredom, provide exercise on rainy days, and even reinforce good behaviors. Just remember to apply some rules to the game such as: you start and stop the game, your dog must 'drop it' when told, if teeth touch skin the game ends. By following some simple rules your dog also learns self control.
TIP #2: MAKING DOG-DOG INTRODUCTIONS:
Jeff Dentler, CPDT-KA, IAABC-ADT, FFCP, CTDI