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Related to Great Pyrenees: Tibetan mastiff
a very large (90-140 lb), powerfully built dog with a medium to long, thick coat in white, sometimes with patches of badger, gray or pale yellow. The ears are small and the tail long. Characteristically, there are double dewclaws on the hindfeet. The breed is predisposed to osteochondrosis. Outside North America, called Pyrenean Mountain dog.