Iditarod Trail Sled Dog Race remaining top thirty finishers won an average of $26,500 each. Mushers make money from their sponsorships, speaking fees, advertising contracts and book deals. The original sled dogs were bred by the Mahlemuit (also known as Kuuvangmiut or Kobuk) people and are one of the earliest domesticated breeds known. They were soon crossbred with Alaskan huskies, hounds, setters, spaniels, German shepherds, and wolves. As demand for dogs skyrocketed, a black market formed at the end of the 19th century which funneled large dogs of any breed to the gold rush. Siberian huskies were introduced in the early 20th century and became
Iditarod Trail Sled Dog Race reveals the results of tests on the dogs. Each team is composed of twelve to sixteen dogs, and no more may be added during the race. At least five dogs must be on the towline when crossing the finish line in Nome. Mushers keep a veterinary diary on the trail and are required to have it signed by a veterinarian at each checkpoint. Dogs that become exhausted or injured may be carried in the sled's "basket" to the next "dog-drop" site, where they are transported by the volunteer Iditarod Air Force to the Hiland Mountain Correctional Center at Eagle River