Few events attract as much attention, or create as much spectacle, as the Iditarod Trail Sled Dog Race. Each March, despite subzero temperatures and white-out winds, hundreds of dogs and mushers journey to Anchorage, Alaska, to participate in "The Last Great Race on Earth," a grueling, thousand-mile race across the Alaskan wilderness. In Four Thousand Paws, award-winning trail veterinarian Lee Morgan tells the story of the heroic canine athletes who,...