We have 3 and they have saved us a lot of $$$ in lost sheep to stray dogs and coyotes. Even warn off occasional cougar although it would take at least 4 to kill a large one. Friend in Texas had 2 adults and 3 half grown pups kill a huge male that had been killing sheep, goats, and calves in the area. Dogs had a couple cuts but survived. Our male is not friendly to strangers so be aware if he decides that is his field and his cows you might need to lock him up when loading for sale. Or using herding dogs since he will probably try to kill them. They are not good with other dogs of same sex and age. However, mini dogs they will allow - not sure if they recognize them as dogs. LOL
Great guardians. Not usually used with cattle except young calves. Make sure he accepts you as his own.