Tibetan Mastiff, Faithful Guardian of Monasteries, the Most Ancient Dog Breed

A Tibetan Mastiff dog.

No worries here. The local nomads claimed these dogs could run swiftly like a tiger, stand tall like a donkey, and roar loudly like a lion, while being handsome. These dogs bravely protected their herds and villagers from animals such as leopards and wolves. (Image: Jagodka via Dreamstime)