The dogs were known in German as Rottweiler Metzgerhund, meaning Rottweil butchers' dogs, because their main use was to herd livestock and pull carts laden with butchered meat to market. This continued until the mid-19th century when railways replaced droving. Although still used to herd stock in many parts of the world, Rottweilers are now also used as search and rescue dogs, as guard dogs, and as police dogs. Although still used to herd stock in many parts of the world, Rottweilers are now also used as search and rescue dogs, as guard dogs, and as police dogs. The dog breed was subsequently named after Rottweil, a town in the region. It became an important trade center and the descendants of the Roman cattle dogs proved their worth by driving the cattle to market and protecting the cattle from robbers and wild animals. They generally show a loose eye and have a great amount of force while working well off the stock. They make much use of their ability to intimidate.