The Bullmastiff is a British breed of dog of mastiff type and large size, with a solid build and a short muzzle. It was developed as a guard dog in the nineteenth century by cross-breeding the English Mastiff with the now-extinct Old English Bulldog. It was recognised as a breed by The Kennel Club in 1924. The Bullmastiff is a large dog. Bitches stand some 61–66 cm at the withers, and usually weigh 41–50 kg; on average, dogs stand about 3 cm taller and weigh 9 kg more. The coat may be fawn, red or brindle, in any shade; some limited white marking on the chest is allowed. The muzzle is black, becoming paler towards the eyes. (Source: Wikipedia.org, CC BY-SA)