The Tibetan Mastiff is among the largest breeds. Its sturdy bone structure and large wide head makes it appear considerably more massive than other dogs of a similar height. Its double coat is long and usually all black, although it can also have areas of tan or gold, and coat colors of Gray, gold, and brown are also possible. The dogs that remain in Tibet are ferocious and aggressive unpredictable in their behavior and very difficult to train. But the dogs bred by the English are obedient and attached to their masters. Today in Tibet, Nepal, and other Himalayan regions, a pure Tibetan Mastiff is hard to find. However, when available, they are mostly used as livestock guardians well adapted to the rigors of high mountain living. Traveling with the caravans of the Tibetan sheepherders and traders, the dogs are expected to defend the herds and tents of their masters against predators such as wolves and snow leopards. Others are used as homestead guardians, chained to gates and rooftops.
As a domestic dog it requires at least a yard it is not an appropriate dog for an apartment. Through hundreds of years as a guard dog, the breed has developed a tendency to bark at sounds during the night so leaving it outside at night with nearby neighbors is not usually recommended. The Tibetan Mastiff is usually good with children in a family home.
Like most herding breeds, they are intelligent and learn quickly. Obedience training is imperative, since this is also a strong-willed dog with powerful jaws, strong muscles, and a tremendous body.