The Appenzeller Sennenhund is a medium-size breed of dog, one of the four regional breeds of Sennenhund-type dogs from the Swiss Alps. The name Sennenhund refers to people called Senn, herders in the Appenzell region of Switzerland. The Appenzeller originated as an all-around farm dog breed, who stayed busy herding the livestock, guarding the farm, and pulling carts in his native Switzerland. Appenzeller Sennenhunds do shed, and they can shed very, very heavily. This shedding is usually worst when the season’s change and the dog change coats.