The Bernese Mountain Dog is a large-sized breed of dog, one of the four breeds of Sennenhund-type dogs from the Swiss Alps. The name Sennenhund is derived from the German Senne (“alpine pasture”) and Hund (“dog”), as they accompanied the alpine herders and dairymen called Senn. Berner refers to the area of the breed’s origin, in the canton of Bern. This mountain dog was originally kept as a general farm dog. The breed was officially established in 1907.