FILE - Sled dogs mush along Cordova Street during the ceremonial start of the Iditarod Trail Dog Sled Race on Saturday, March 2, 2024, in Anchorage, Alaska. This year the deaths of three dogs during the race — and five more during training — have refocused attention on the sport’s darker side and raised questions about the ethics of asking animals to pull a heavy sled for hundreds of miles in subzero temperatures. (Loren Holmes/Anchorage Daily News via AP, File)
Dallas Seavey celebrates his win in the Iditarod Trail Sled Dog Race, Tuesday, March 12, 2024, in Nome, Alaska. (Anne Raup/Anchorage Daily News via AP)
FILE - Sled dogs wait before the ceremonial start of the Iditarod Trail Sled Dog Race on Saturday, March 2, 2024, in Anchorage, Alaska. This year the deaths of three dogs during the race — and five more during training — have refocused attention on the sport’s darker side and raised questions about the ethics of asking animals to pull a heavy sled for hundreds of miles in subzero temperatures. (Marc Lester/Anchorage Daily News via AP, File)
Dallas Seavey lifts up one of his dog team members, Timon, so they could wave to the crowd in the finish chute of the Iditarod Trail Sled Dog Race on Tuesday, March 12, 2024, in Nome, Alaska. Seavey won the race. (Anne Raup/Anchorage Daily News via AP)
FILE - A musher leaves downtown during the ceremonial start of the Iditarod Trail Dog Sled Race on Saturday, March 2, 2024, in Anchorage, Alaska. This year the deaths of three dogs during the race — and five more during training — have refocused attention on the sport’s darker side and raised questions about the ethics of asking animals to pull a heavy sled for hundreds of miles in subzero temperatures. (Marc Lester/Anchorage Daily News via AP, File)