Sled dogs are highly trained dogs that are used to pull a dog sled. Any dog can be used as a sled dog as long as he can pull the sled. But International Sled Dog Veterinary Medical Association has put some criteria that must be satisfied before qualifying a dog as a sled dog. The sled dog must have willingness to be harnessed and should have desire to participate in the activity for which it is harnessed. The dog must be well trained and must be vaccinated. Several distinction dog breeds are generally used as sled dogs but drivers have a long history of using crossbreeds as a sled dog. The main quality required for a sled dog is endurance and speed. A sled dog should have the endurance to travel up to 80 miles in a day with the speed more than 20 miles per hour and should have the strength to pull more than 85 pound. The most common purebred dog sledding breeds are Siberian husky and Alaskan malamute. Siberian husky was originally bred to be used as an Alaskan sled dog but now they ar...