The blue ACD shown in this Animal Planet video is the personal dog of an ACDRA volunteer!
The Australian Cattle Dog (ACD) was developed by Australian ranchers who needed a cattle drover with endurance for long distances. The ACD’s immediate ancestor was the Hall's heeler, a dog developed from a cross of the dingo and the smooth-coated Scottish collie. In about 1860, the Hall’s heeler was mixed with the Australian Kelpie and the Dalmatian to create the modern Australian Cattle Dog.
ACDs are medium-size, sturdy, and muscular with a strong broad head and a medium-length, tapering muzzle. The almond-shaped eyes are brown and the large nose is black. The medium-size ears are naturally erect. This dog has a muscular neck, deep chest, and muscular hindquarters. The brush tail is long The double coat has a dense undercoat and a smooth hard outer coat of medium length, longer at the thighs and the neck. It may be blue, mottled or speckled, with or without black, blue or tan markings; or red speckled, with or without darker red markings.
ACDs are also known as Blue Heelers, Queensland Heelers, Red Heelers and Cow Dogs.