Bullmastiff

The Bullmastiff is a large size breed of domestic dog, with a solid build and a short muzzle. The Bullmastiff shares the characteristics ofMolosser dogs, and was originally developed by 19th-century gamekeepers to guard estates. The breed's bloodlines are drawn from theEnglish Mastiff and the extinct Old English Bulldog. It was recognized as a purebred dog by the English Kennel Club in 1924. They are quiet dogs and very rarely bark.

Weight	Male	110–130 lb (50–59 kg)
	Female	100–120 lb (45–54 kg)
Height	Male	25–27 in (64–69 cm)
	Female	24–26 in (61–66 cm)
Coat	Short and weather resistant
Colour	Any shade of brindle, red or fawn.
Life span	8-10 years

source : wikipedia