A participant and his dogs compete during an international dog sled race near the village of Duboshi, some 25 miles northwest of Minsk, January 29, 2011.
A Siberian Husky looks through a grate inside a kennel during the 11th annual WyColo Mid-distance Classic Sled Dog Race, January 15, 2010, in Medicine Bow National Forest near WyColo, Wyoming.
Jessica Lowthorp is greeted by a Siberian Husky during the 11th annual WyColo Mid-distance Classic Sled Dog Race, January 15, 2011, in Medicine Bow National Forest near Wycolo, Wyo.
Willow, Alaska Iditarod musher Karin Hendrickson's swing dog Aberdeen and leader Chase keep an eye on things at the Takotna checkpoint during the 2011 Iditarod Trail Sled Dog Race, March 9, 2011.
Ontario musher Hank DeBruin looks over his dog team upon completing the 2011 Yukon Quest International Sled Dog Race, February 18, 2011, in Fairbanks, Alaska.
A dog waits to be harnessed during practice for the Aviemore Sled Dog Rally on the shores of Loch Morlich, Scotland, January 20, 2011. The rally participants include over 1000 dogs and 200 mushers.
Spanish musher Alvaro Lopez Cobo guides his dogs during the sixth stage of the Pirena Advance 2011 sled dog race in Val d'Aran, in the Pyrenees mountains of northern Spain, February 10, 2011.
France's Thomas Caillibot competes with his dogs on the second day of the Dog Sleigh racing World championships in Slovakia's Donovaly resort, February 12,2011.
An injured dog sits in a sled at the arrival of the tenth stage of La Grande Odyssee sled dog race in Bessans January 17, 2011. The race crosses the Alps in France and Switzerland covering over 621 miles over 11 days.
Iditarod musher Peter Kaiser's leaders Sweeper and Frosty are ready to hit the trail as the musher arranges his dog team before leaving the Nikola, Alaska, checkpoint during the 2011 Iditarod Trail Sled Dog Race, March 8, 2011.
Iditarod musher Hans Gatt from Whitehorse, Yukon Territory washes out his dog food trays next to the hot water barrel at the Takotna checkpoint during the 2011 Iditarod Trail Sled Dog Race, March 9, 2011.
A dog waits at the Polar Base before the start of the tenth and final stage of La Grande Odyssee sled dog race in the early morning at Mont Cenis, January 19, 2011.
Italian musher Germano De Martin inspects one of his dogs at the Polar Base at Mont-Cenis road after the eighth stage of La Grande Odysee sled dog race in Lanslebourg, January 15, 2011.