Mushers and their huskies practice at a forest course ahead of the Aviemore Sled Dog Rally on January 24, 2016 in Feshiebridge, Scotland. Huskies and sledders prepare ahead of the Siberian Husky Club of Great Britain 34th race taking place at Loch Morlich this weekend near Aviemore. (Photo by Jeff J. Mitchell/Getty Images)





Dogs play together during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Husky dogs pull a rig and its musher during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Husky dogs pull a rig and its musher during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Husky dogs pull rigs with their mushers during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





A Husky dog waits to run during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Husky dogs wait to run during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





A Husky dog waits to run during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





A Husky dog with a missing leg waits to run during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





A Husky dog licks musher Kirsty Munday in the face as it waits to run during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Husky dogs pull a rig and its musher during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Husky dogs pull a rig and its musher during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Husky dogs wait to run during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





A Husky dog pulls a rig during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Husky dogs and their mushers rest during practice for the Aviemore Sled Dog Rally in Feshiebridge, Scotland, Britain January 24, 2017. (Photo by Russell Cheyne/Reuters)





Mushers and their huskies practice at a forest course ahead of the Aviemore Sled Dog Rally on January 24, 2016 in Feshiebridge, Scotland. (Photo by Jeff J. Mitchell/Getty Images)