The Tibetan Mastiff is an ancient breed of mountain dog that resides primarily with the nomadic tribes in the Himalayas. A study in Nanjing, China found that while most common dog breeds genetically diverged from the wolf 42,000 years ago, the Tibetan Mastiff genetically diverged from the wolf 58,000 years ago. Most large protective dogs like Dobermans, Rottweilers, and German Shepards are classified as guard dogs, while the Tibetan Mastiff is considered to be a guardian breed. Guardian breeds are much more primitive and independent, exhibiting an extremely stubborn nature and a wondrous depth of intelligence and character. They typically don’t show any of the attributes of the more trainable breeds that can be taught to perform simple or complex routines. While other more domesticated breeds may enjoy fetching games, the primitive Tibetan Mastiff focuses on his working abilities which include guarding, alerting through barking, patrolling and basic territorial/dominant behavior. These dogs have been bred for thousands of years to do this, its hard to change that.