rottweiler

The Rottweiler, or Rottweil Metzgerhund ("Butchers Dog"), is a "medium to large size, stalwart dog"breed originating in Germany as a herding dog. It is a hardy and very intelligent breed. Rottweilers also worked as draught dogs, pulling carts to carry meat and other products to market as well as for hunting . "Rottweiler breeders aim at a dog of abundant strength, black coated with clearly defined rich tan markings, whose powerful appearance does not lack nobility and which is exceptionally well suited to being a companion, service and working dog.
The Rottweiler was kept busy in these traditional roles until the mid-19th century when railroads replaced droving for getting livestock to market. Although there are still Rottweilers working stock all over the world, many other roles have been found for this versatile breed.
During the First and Second World Wars, Rottweilers were put into service in various roles including as messenger, draught, and guard dogs. Currently they are often used as search and rescue, assistance, guide dogs for the blind, guard and police dogs in addition to their traditional roles.