The Appenzeller Sennenhund is a large mountain dog, Like the other Sennenhunds, the Appenzeller Sennenhund has a heavy, molosser-like build and a distinctive tricolor coat. The breed's ears are small and triangular, and they are set high and hanging down against the dog's cheeks, which is similar to a button ear.
The Appenzeller was originally bred as a cattle herding dog as well as livestock guardian in Switzerland. It is believed that the Greater Swiss Mountain Dog is the oldest of the Swiss breeds with the others descending from it. The Appenzeller is the rarest of the Swiss breeds. The first valid Breed Standard was prepared in 1914 with its original breeding territory being the Appenzell region. Today, the breed is found all over Switzerland and in many European countries. However, breeding stock is still limited and, though gaining in popularity, the breed is still rare in North America. Today, the breed is still commonly used as a livestock guardian, herding dog, draft animal and an all-purpose farm dog. He is also seen participating in obedience and performing Shutzhund work. In addition, in his native Switzerland, the Appenzeller is seen working as a Avalanche Rescue Dog, Tracking Dog and Protection work.