Australian Cattle Dog Definition

A dog of a medium-sized breed developed in Australia to herd cattle, having a muscular body and a short blue or red speckled coat.

Any of a breed of medium-sized dog developed in Australia for herding cattle and obtained by crossing various breeds, principally the dingo, collie, and Dalmatian, characterized by pointed ears and a moderately short, straight coat that is blue, blue with tan markings, or red speckled.

A breed of herding dog developed in Australia for controlling cattle. Varieties include the Queensland Heeler, Blue Heeler, and Red Heeler.