The dog has been man's best friend for thousands of years. The friendly, obedient animals serve people throughout the world in work, play and sports. Dogs live near the Eskimo's igloo, in jungle villages, in farm houses and in city apartments. Many dogs have given their own lives to save or protect their masters. Dogs guard the home and herd cattle and sheep. Their keen sense of smell makes them fine hunting companions. Dogs were the first animals to be tamed by man. Most dogs can be trained ...