The Entlebucher (Entlebuch Mountain Dog/Entlebucher Cattle Dog) is the smallest of the four Swiss Sennenhund breeds.
The crossing of the Roman Mastiffs with the local Swiss working dogs during the time of the Roman invasion of Europe resulted in the Sennenhunds: theGreater Swiss Mountain Dog,Appenzeller Sennenhund, Entlebucher andBernese Mountain Dog.
It is generally accepted that the Greater Swiss Mountain Dog was the first of these breeds, and the other three developed from it. The Entlebucher was primarily used by Alpine herdsmen to drive cattle.