Tibetan Mastiff training?  I bet you’d never heard of one until now. The Tibetan Mastiff one of 20 of the rarest dogs.  Yes, you see Labs walking down the street, but you rarely see a Tibetan Mastiff. And if you do, I guarantee you’ll do a double take!  The Tibetan Mastiff is huge in size and noble in bearing, known for a “solemn but kind expression” and an impressive double coat. Its aloof, watchful, and independent nature makes the Tibetan Mastiff an excellent guardian breed but a reluctant participant in organized activities like obedience.