Meanwhile at home, millions of dogs and cats are kept as subjects of the humans who 'need' the emotional support (or something), while they feed upon the junk food of a hugely commercialized pet food industry  (out of boredom among other things), to the point of morbid obesity or indigestion in many cases. Dogs were wild animals who have been the subjects, slaves even, of genetically curious humans who have 'morphed' them well beyond their natural designs. Sled dogs are much less genetically changed, and don't exhibit any of the gross weaknesses and deformities which so many "breeds" do. The fact that they live out their lives doing what they love: to run, is a much greater tribute to the people who 'own' them, than are those who harbor animals whose genealogy reflects, in many cases, gross genetic experimentation  and are subject to the abhorrent living conditions of human dwellings.