Dogs, one of the world's greatest companions. A dog is a domesticated carnivorous mammal that typically has a long snout, an acute sense of smell, nonretractable claws, and a barking, howling, or whining voice. As of this writing, approximately 42.5 million households in the U.S. own one or more dogs and the total number of dogs in the country is in excess of 73 million. Canada has approximately 6 million pet dogs. In Western Europe, there are around 43 million pet dogs.
