Sled dog each year, but after the 1995 events, it was decided to hold them every two years, which facilitated the bidding process and enabled the host organization more time for preparation. Togo was the lead sled dog of Leonhard Seppala and his dog sled team in the 1925 serum run to Nome across central and northern Alaska. Balto was the lead dog of the sled dog team that carried the diphtheria serum on the last leg of the relay to Nome during the 1925 diphtheria epidemic. He was driven by musher Gunnar Kaasen, who worked for Leonhard Seppala. Seppala had also
Sled dog but cannot pull as long. They weigh between , and have been selectively bred for both appearance and pulling ability. Numerous non-sled dog breeds have been used as sled dogs. Poodles, Irish setters, German shorthaired pointers, Labrador retrievers, Newfoundlands, and St. Bernards have all been used to pull sleds in the past. FSS held the first World Championships (WCh) in Saint Moritz, Switzerland in 1990 with classes in only Sled Sprint (10-Dog, 8-Dog, and 6-Dog) and Skidog Pulka for men and women. 113 competitors arrived in the starting chutes to mark the momentous occasion. At first World Championships were held