Australian Cattle Dogs, widely called Blue Heelers, were developed in nineteenth-century Australia to drive cattle over long distances in heat and dust. The result is a compact, muscular dog of about 35 to 50 pounds with a weatherproof double coat in blue or red speckle.
Heelers tend to be loyal, alert and quick to learn, often bonding closely with one person and staying reserved with strangers. Their herding drive can show up as nipping at heels or chasing bikes and kids, though it varies from dog to dog. The coat sheds moderately, with heavier blowouts once or twice a year. Many live 12 to 16 years, so adopting one is a long commitment to training and activity.