The Spanish Mastiff or Mastín Español is a breed of dog from Spain, originally bred to be a guard dog and whose specialized purpose is to be a livestock guardian dog protecting flocks and/or herds from wolves and other predators. The Spanish Mastiff is a very large and powerful dog, similar in appearance to the other mastiff breeds. They have a large powerful head and serious and vigilant expression. Males in this breed are 70 to 85 centimetres (28 to 33 in) tall at the withers, and range from 50 to 70 kilograms (110 to 150 lb). Females are at least 65 centimetres (26 in), and weigh 40 to 60 kilograms (88 to 132 lb). It has small eyes and drop ears resembling triangles. This dog's coat is most often fawn, but it can also be brindle, black or 'wolf'-colored. Reddish tones indicate miscegenation. (Source: Wikipedia.org, CC BY-SA)