The Australian Kelpie is a lean, medium-sized herder developed in 1870s Australia from Scottish working collies to move Merino sheep across hot, open country. The breed is about 150 years old and has two strands: a show strand that follows a written standard and a working strand chosen for ability, so looks and energy levels vary. Adults usually stand 17 to 20 inches and weigh 25 to 45 pounds, with a short, weather-resistant double coat that sheds moderately.
Many Kelpies are loyal, alert and quick to learn, though reserved with strangers. Without a job, a Kelpie may nip at heels, chase bikes, bark or dig. In Scottsdale, that means planning daily exercise and training around the desert heat, with a securely fenced yard or a firm routine of leashed outings. Adopters who enjoy dog sports tend to do best, but Kelpies vary, so judge each dog on its own behavior.