There are more than fifty-five million dogs in the United States, beloved pets that depend upon the attentive care of their human companions. Now, from the name that pet owners have turned to for generations, comes 'The Purina encyclopedia of dog care'. This reference addresses virtually every concern that may arise about your best friend - how can I tell whether my dog is really sick? Can I treat him at home or does he need a vet? What health problems tend to be breed-specific?