Extinction is a real danger - Greenland 
Greenland Sled Dogs At Risk
The domestic dog is one of the world’s most successful species by any ecological measure, so discussing their conservation may seem odd. However, despite the widespread distribution and huge numbers of dogs, there are genetic populations of them at risk. One such group is the Greenland Sled Dog, which lives in human communities north of the Arctic circle on both the east and west coasts of Greenland.
The ancestors of the Greenland Sled Dogs were first brought to the region nearly a thousand years ago by the Thule people, who are the ancestors of the modern Inuit. Genetic studies published in 2015 established that these dogs are not a separate breed from the Canadian Eskimo Dog, but that the population is distinct from Siberian Huskies, Alaskan Huskies and Malamutes.
Greenland Dogs are 20-27 inches high at the shoulders, with males typically in the larger half of that range and females in the smaller half. Dogs of both sexes are powerfully built with wide wedge-shaped heads and muscular legs with short fur. These dogs have a double coat and very small ears, presumably to help prevent frostbite. When they lie down and curl up, their tail often covers the nose, though it is held high and across the back when standing. Many dogs have a triangular patch across the shoulders.
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