The Australian Kelpie, or simply Kelpie, is an Australian sheepdog. The word 'Kelpie' is Gaelic and means "water sprite". They are very successful at herding and driving livestock with little or no guidance. The Kelpie is a medium-sized dog. They come in both the tan markings and solid colors. The Kelpie has been exported throughout the world and is used mainly to herd sheep, cattle and goats. 