Despite the name, the Australian Shepherd took shape on ranches in the American West during the 1800s, likely from Spanish and Basque herding dogs mixed with collie types that arrived with sheep shipped from Australia. Ranchers prized its stamina and quick thinking, and rodeo performances in the mid-1900s made it famous. Aussies are medium dogs, usually 40 to 65 pounds, with a weather-resistant double coat in merle, black or red, and eyes that can be blue, brown, amber or a mix.
Many Aussies are intelligent, devoted and tireless, happiest with a job to do. They tend to bond tightly with family and can be reserved with strangers. Without daily exercise and mental work, that drive can turn into chewing, barking or herding children and other pets. The coat sheds moderately to heavily, so expect regular brushing. Every Aussie differs, so judge each dog's energy and manners rather than the breed alone.