There are three breeds of dogs that stem from the high mountain regions of Tibet. The Tibetan Terrier, the Tibetan Spaniel and the Tibetan Mastiff. All three are indigenous to the region and were known to be in existence as long as 1000 years ago. The Himalayan regions of Tibet encompass high cold mountains and hot deserts and grassy flat plateaus. The dogs that developed are hardy and adaptable because of the harsh regions in which they originated. The people of Tibet are wanderers and nomadic in nature. they did not purposely breed dogs. Thus the Tibetan Terrier, known for being of compact size, possessing double coat and great agility and large flat feet, suitable for crossing the rugged terrain, is a true creature which demonstrates "survival of the fittest".