Built to pull carts and work hard in central Switzerland, the Bernese Mountain Dog is believed to be more than 2,000 years old. Bernese are incredibly loving, affectionate, and devoted family pets. Their calm nature and patience are ideal around children, and they are willing and quick learners. The distinctive black, white and rust colors of the Bernese are uniform throughout the breed. Bernese Mountain Dogs thrive in larger living spaces, because of their size and moderate energy level.