Your dog just doesn't seem to listen. You've been through obedience training, but he still can't seem to master the most basic commands. And nothing you do seems to prevent him from misbehaving. "Clients usually come to me when their dogs are ruining their lives, not when they won't sit," says Cesar. "But everywhere I go, people are telling me they are confused about the wide variety of training options and theories out there, and they feel...