The Rottweiler (/ˈrɒtwaɪlər/, UK also /-vaɪlər/) is a breed of domestic dog, regarded as medium-to-large or large. 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 police dogs.
he St. Bernard or St Bernard (UK: /ˈbɜːrnərd/, US: /bərˈnɑːrd/) is a breed of very large working dog from the western Alps. They were originally bred for rescue at the Great St Bernard Pass on the Italian-Swiss border, and Little St Bernard Pass in the Italian-French border,located close to one another. The two hospices were built and run by the same monk brotherhood. The breed has become famous through tales of alpine rescues, as well as for its enormous size.