The Alaskan husky is not an officially recognized breed by any kennel club, nor does it have a formal breed standard. Unlike breeds developed for the show ring, the Alaskan husky is instead a product of careful selection for desirable sled dog traits from various other breeds, such as aptitude for pulling, endurance, speed, intelligence, appetite, and tolerance of extreme weather. As a result of this specific and mindful performance-only based breeding, DNA studies show that Alaskan Huskies share a genetic signature and indeed can be identified accurately on DNA breed tests