Arranged in chapters covering physical characteristics, senses, life cycle, communication, and behavior, Dogs is a hugely informative visual celebration.   The first species to be domesticated, dogs have been selectively bred over thousands of years. Today they're man's best friend—but while many are pets, many, too, are working animals: as K-9s for the police, guide dogs for the blind, guard dogs, sheepdogs, sled dogs, and therapy animals. From huskies to German shepherds, from collies to Chihuahuas, Shih Tzus to Jack Russell terriers, Labradors to bullmastiffs to dachshunds, the book includes a huge range of breeds. With fascinating captions on every page, even dog lovers will learn something new. Dogs is a brilliant examination in outstanding color photographs.