The Australian Shepherd was developed on ranches in the American West, not Australia, and it still carries a stockdog's stamina and quick thinking. Medium-sized at roughly 40 to 65 pounds, it has a weather-resistant double coat in merle, black or red, often with white and copper trim and striking blue or mixed eyes.
Many Aussies are devoted to their families, reserved with strangers, and happiest with a task. In McKinney, that can mean steady training, games in a fenced yard and long trail walks. Without that outlet, herding of children, chewing or barking can follow, so Aussies suit active adopters who enjoy working with a dog. Dogs vary, and an adult's own habits say more than the breed label.