The Rottweiler, or Rottweil Metzgerhund, is a large dog breed originating in Germany as herding dogs. It is a hardy and very intelligent breed. Early Rottweilers worked as beasts of burden, carrying wood and other products to market. During the first and second World Wars, Rottweilers were put into service as war time guard dogs. Currently they are frequently used as guard and police dogs. The Rottweiler was first recognized by the American Kennel Club in 1931.(Wikipedia)
According to FCI standard, the Rottweiler stands 61 to 68 cm (24-27 inches) at the withers for males, and 56 to 62.5 cm (22-25 inches) for females.[2] Average weight is 50 - 55 kg (80-120 pounds) for males and 42 kg (70 - 95 pounds) for females.(Wikipedia)
In the hands of a responsible owner, a well trained and socialized Rottweiler can be a reliable, alert dog and a loving companion. Rottweilers that are well trained and cared for can be as well behaved as any other dog and, in general, quick to learn. The Rottweiler is a working dog that is also good for guard duties.(Wikipedia)