In early 1800s, Bullmastiff, a fairly new breed, was developed to prevent poaching in the English estates. Though people thought Mastiff as courageous, it was not fast enough and sufficiently aggressive to satisfy the owner’s need. The Bullmastiffs used as gatekeeping dogs was a cross of 40% Old English Bulldog and 60% English Mastiff. The cross resulted in the development of this breed that was totally utilitarian.