The Australian Shepherd is a medium-sized herding dog, usually 40 to 65 pounds, with a weather-resistant double coat in merle, black or red and eyes that can be brown, blue or a mix. Despite the name, the breed developed on ranches in the western United States, where stockmen valued its stamina and quick thinking with sheep and cattle.
That working background explains most of what living with one is like. Aussies are bright, loyal and often reserved with strangers, and many need real exercise and mental work to stay out of trouble. Shedding is moderate to heavy, so regular brushing helps. A dog's actual energy, coat and manners matter more than the breed label, and adult Aussies often show their habits already.