The Bull Mastweiler is a popular hybrid, a cross between the Bullmastiff and a Rottweiler, both large and capable dogs that have traditionally been employed as guard dogs and family protection animals. The Bullmastiff is the only guarding breed dog that was developed in England, originally a crossbreed itself, a combination of the English Bulldog and the English Mastiff. They were developed to be guards of the grounds and game on large English estates protecting them from poachers and thieves; the Mastiff was too large and slow for the job, and the Bulldogs of the time didn’t have the restraint needed to prevent mauling of the poachers. The Bullmastiff is a smaller, more agile breed than the Mastiff and a larger and more controlled animal than the Bulldog of the time. The Rottweiler is a German dog, a breed old enough that their full origins are obscured by history, although it is believed by most that they were the descendants of large Roman dogs that drove cattle for the cattlemen and butchers, known as drover dogs, sometime prior to 700 A.D. They were named for the area that they were developed in, a site known as Rottweil for the abundance of red, Roman tiles that were unearthed there. Although their popularity declined during the industrial revolution in the 1800’s, it was rekindled in the 1900’s and they were often employed as police or military animals. The hybrid of the two is less aggressive and more intelligent than the Bullmastiff as well as calmer and less stubborn than the Rottweiler.