Shaggy working dog developed in early 18th-century England and used primarily to drive sheep and cattle to market.
It has a shuffling, bearlike gait and a dense, solid-coloured or white-marked gray or blue-gray coat. It stands 21–26 in. (53–66 cm) tall and weighs over 55 lb (25 kg). Its long, dense, weather-resistant coat covers the eyes but does not obscure vision. The tail is usually removed soon after birth.