<Tr> <Td_colspan="2"> Domestic dog (Canis lupus familiaris) </Td> </Tr> <P> The Bullmastiff is a large - sized breed of domestic dog, with a solid build and a short muzzle . The Bullmastiff shares the characteristics of molosser dogs, and was originally developed by 19th - century gamekeepers to guard estates . The breed's bloodlines are drawn from the English Mastiff and the extinct Old English Bulldog . It was recognized as a purebred dog by the English Kennel Club in 1924 . </P> <P> Bullmastiff males should stand 25--27 inches (64--69 cm) tall (American Kennel Club (AKC) standard) at the withers and weigh 110--130 pounds (50--59 kg). Females should be 24--26 inches (61--66 cm) at the withers, and 100--120 pounds (45--54 kg). Exceeding these dimensions is discouraged by breeders . </P> <P> A Bullmastiff's coat may appear in fawn, red, or brindle . These are the only acceptable colours in the AKC standard . The fawn can range from a very light brown to a reddish brown . Red can range from a light red - fawn to a dark, rich red . Brindles are a striped overlay of the fawn or red . A Bullmastiff should have no white markings, except for on the chest where a little white is allowed . </P>

What's the average weight of a bull mastiff
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