The Boerboel [ˈbuːrbul], is a large, mastiff-type dog breed from South Africa that is bred for the purpose of guarding the homestead and working the farm. They are one of the most powerful dog breeds in the world and have an estimated bite force around 800-850 PSI.Boerboel breeding is both a hobby and an industry in South Africa. Individual boerboels have been documented killing Adult male leopards. A Boerboel requires a significant commitment in time and energy as they need to be trained and properly socialized in order to be happy, well-adjusted family members.These dogs thrive under positive reinforcement training techniques and require human companionship and structure. If left isolated, Boerboels will digress and may become destructive.