John Ross and Barbara McKinney, the country's foremost dog-training experts, reveal the lifelong benefits of early training in this definitive guide devoted exclusively to the trials and triumphs of puppy rearing. "Puppy Preschool" rewrites the rules on raising a great dog. Whereas other training books begin their programs when the puppy has already reached four months of age or more, "Puppy Preschool" begins educating and shaping behavior right from...