Australian Cattle Dogs, also called Blue Heelers or Queensland Heelers, come from nineteenth-century Australia, where settlers crossed collie-type herding dogs with dingoes to move cattle across hot, dry country. That background suits the Mojave Desert better than many breeds. The short, weatherproof double coat and tough frame are built for sun and dust, though not for 105-degree afternoons on hot pavement. Adults weigh about 35 to 50 pounds and wear a blue or red speckled coat.
Heelers are clever, loyal and often attached to one person, with a strong urge to chase and herd. That can mean nipping at heels or fixating on bikes and passing cars. Dogs vary, and young ones are usually the most intense, settling around two years old. Daily jobs, training and secure fencing matter more than any single trait.