The English Bullmastiff or English Mastiff is a devoted, alert guard dog, with a good-natured temperament, though he tends to be willful. Docile unless provoked, he is fearless and protective, yet affectionate. Although unlikely to attack, it will catch an intruder, knock him down and hold him. At the same time, it is tolerant of children. Intelligent, even-tempered, calm and loyal. These dogs crave human attention. The Bullmastiff is an extremely powerful dog and needs a firm master. They should be thoroughly obedience trained for safety, and should be taught not to pull on the leash. Be sure to socialize extensively with both people and other dogs at an early age.