Do you have a couch-potato pooch who needs stimulating? A hyperactive hound who you'd like to get to relax? Find the advice you need, as well as a good dose of humor and charm, in How To Massage Your Dog. As this letter from Mandy the Mutt, a satisfied dog, says, "I was a little skeptical when you started touching me in this new manner, but I must admit it is very relaxing and does help take my mind off our regular trips to the veterinarian.... With...