The Australian Kelpie was developed in the 1870s from Scottish working collies to move Merino sheep across hot, open country. It's a lean, medium-sized dog, usually 25 to 45 pounds, with prick ears, a short weather-resistant double coat and colors that include black, red, blue, tan and chocolate, often with tan points. Two strands exist today: show Kelpies, and Working Kelpies, which often carry more drive.
Kelpies are alert, quick learners and devoted to their people, but without a job they may nip at heels, chase bikes, bark or dig. They shed moderately, so weekly brushing keeps the house manageable. Dogs vary a lot, so a Kelpie's energy and sensitivity depend on the dog, not just the breed.