The Australian Shepherd took shape on Western ranches in the 1800s, where its stamina and quick thinking made it a favorite for moving sheep and cattle. It's a medium-sized dog, 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 or a mix.
Most Aussies are smart, loyal and happiest with a job. They bond tightly with family and can be reserved with strangers. In a place with long, warm stretches of the year, that means planning early walks, training games and indoor puzzle work so the dog's energy has somewhere to go. Without it, Aussies may bark, chew or try to herd children and other pets.