I’ve seen ranchers here in Central Texas keep packs of large guard dogs within their property. That keeps everyone honest, especially coyotes and hogs.
We were driving on a very rural dirt road in west central Texas and saw a flock of sheep. They were being guarded by 2 of the most magnificent huge white dogs. Can’t remember the breed right now but I would not have gotten out of the car even to fix a flat near those dogs. :D