Despite the name, the Australian Shepherd took shape on ranches in the American West in the 1800s, likely from Spanish and Basque herding dogs mixed with collie types that arrived with sheep shipped from Australia. Aussies are medium-sized, usually 40 to 65 pounds, with a weather-resistant double coat in merle, black or red, often with white and copper trim and eyes that can be blue, brown, amber or a mix.
Many Aussies are intelligent, devoted and tireless, and they're happiest with a job to do. They bond closely with family and can be reserved with strangers. Without daily exercise and mental work, that drive may turn into herding children, chewing or barking. The coat sheds moderately to heavily, so regular brushing is part of the deal. Dogs vary, so each Aussie's own behavior matters more than the label.