Blue Heelers, also known as Australian Cattle Dogs, are a medium-sized, short-coated herding breed. They have upright ears, a muscular build and a broad head. Blue Heelers are covered with a mixture of black and white hairs, which makes them look blue.
Blue Heelers often have red or tan hairs on their faces, chests, bellies and legs. They also sometimes have solid patches of color. Common markings include face masks and large spots on the body. Some Australian Cattle Dogs only have red hair mixed with white; they are commonly called Red Heelers. Although some people dock their Heelers' tails, the breed standard calls for a long tail.