The Tibetan Mastiff is an ancient breed and type of domestic dog originating with nomadic cultures of Indian state of Himachal Pradesh, Uttarakanda, Tibet and Central Asia.
Males can reach heights up to 32 inches (81.28 cm) at the withers, although the standard for the breed is typically in the 25- to 28-inch (61- to 72-cm) range. Dogs bred in the West weigh between 105 lb (47.6272 kg) and 180 lb (82 kg)—although dogs in the upper range are often overweight. The enormous dogs being produced in some Western and some Chinese kennels would have "cost" too much to keep fed to have been useful to nomads; and their questionable structure would have made them less useful as livestock or property guardians.
The Tibetan Mastiff is considered a primitive breed. It typically retains the hardiness which would be required for it to survive in Tibet and the high-altitude Himalayan range, including the northern part of Nepal, India and Bhutan. Instinctive behaviors including canine pack behavior contributed to the survival of the breed in harsh environments.