Sled dog lighter sled dogs." Outside of Alaska, dog-drawn carts were used to haul peddler's wares in cities like New York. In 1925, there was a diphtheria outbreak in Nome, Alaska. There was not enough serum in Nome to treat the number of people infected by the disease. There was serum in Nenana, but the town was away, and inaccessible except by dog sled. A dog sled relay was set up by the villages between Nenana and Nome, and 20 teams worked together to relay the serum to Nome. The serum reached Nome in six days. The Iditarod Trail was established on
Iditarod Trail Sled Dog Race Leonhard Seppala. However, this criticism is inconsistent with the fact that Leonhard Seppala was one of the primary mushers who delivered serum in 1925 (see above). Animal protection activists also say that the Iditarod is dog abuse. For example, dogs have died and been injured during the race. The practice of tethering dogs on chains, which is commonly used by mushers in their kennels, at checkpoints and dog drops, is also criticized. People for the Ethical Treatment of Animals spokesperson Jennifer O'Connor says, "We're totally opposed to the race for the cruelty issues associated with it". The ASPCA said, "General