The Australian Shepherd, often known simply as the 'Aussie', is a medium-sized breed of dog that was, despite its name, developed on ranches in the United States during the 19th century. While they continue to work as stock dogs and compete in herding trials, they have earned recognition in other roles due to their trainability and eagerness to please and are highly regarded for their skills in obedience. Like all working breeds, Aussies have considerable energy and drive. They are considered the 17th-most popular dog breed in the United States. The Australian Shepherd has a reputation as a highly intelligent and versatile stock dog with a range of working styles. A good working Aussie is quick, thoughtful, and easy with its stock: there are working lines in the American West that still herd sheep, smaller cattle, and goats. The shepherd should be brushed weekly to maintain a healthy and clean coat and also to prevent matting.