Sled dog. Carrying the mail and the weekly Klondike Nugget, this service covered all the creeks adjacent to Dawson City. The service was established by Jean (or Gene) Allen in 1898. A sled dog is a dog trained and used to pull a land vehicle in harness, most commonly a sled over snow. Sled dogs have been used in the Arctic for at least 8,000 ... More @Wikipedia
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