Tibetan Mastiffs are working dogs. Jobs include guarding of herds, flocks, tents, villages, monasteries, and palaces. They are are intelligent and stubborn, strong-willed and powerful and benefit greatly from proper obedience training. If they are left outside, they tend to sleep during the day, and guard surroundings at night. Barking at night may not be appreciated by neighbors close by. When properly socialized, this large Breed Dog can thrive on a spacious, fenced property with other canine companions, but it is generally not an appropriate dog for apartment living.
The Tibetan Mastiff itself is not a true Mastiff. Some argue that this large Breed Dog should be named Tibetan mountain dog or Himalayan Mountain Dog. Tibetan Mastiffs double coat is long and can be found in a wide variety of colors such as solid black, black and tan, various shades of “red” (from pale gold to deep red) and bluish-gray (dilute black), often with white markings.
Characteristics of the Tibetan Mastiff:
Some Countries show all Tibetan Mastiffs under one breed standard, other countries divide them according to Lion Head (smaller; exceptionally long hair from forehead to withers, creating a ruff or mane) and Tiger Head (larger; shorter hair).
“In 2011, a study concluded that there was a genetic relationship between the Tibetan Mastiff and the Great Pyrenees, Bernese mountain dog, Rottweiler and Saint Bernard, and that these large breed dogs are probably partially descended from the Tibetan Mastiff. In 2014, a study added the Leonberger to the list of possible relatives. – wikipedia