shepherd dog

A shepherd dog (also known as sheep dog or sheepdog) is a type of working dog used by shepherds to herd and/or protect their flocks. The expression may refer to distinct breeds that are recognised by Kennel Clubs, and it may also describe non-purebred types of dogs that are used by shepherds for these purposes.

A herding dog, also known as a stock dog or working dog, is a type of pastoral dog that either has been trained in herding or belongs to breeds developed for herding. Their ability to be trained to act on the sound of a whistle or word of command is renowned throughout the world. Collies are recommended as herding dogs.