The Shetland Sheep-dog is one of the world's most popular breeds. The ancestors of this breed were the herding dogs of Scotland that also provided the root stock for the Collie and Border Collie. Despite its small size, the Shetland is a superb sheepdog. The breed is far more often referred to by its nickname of "Sheltie."  It is very friendly with children, and has readily adapted to its modern role of companion and family dog.