If you want a dog to guard your stock, your best bet would be to get a dog that is from parents who are proven flock guardians. It sounds like there's already a number of them around you, so I would go with the Pyr. While adopting would be a nice thing to do, you want to start a flock guardian from a pup and know that it is from parents who were doing that job. Otherwise, you are drastically increasing your chances of losing stock sue to a dog that is inept.