Our search for actual LGDs began after losing a piglet to a bear, poultry to coyotes and various winged predators, and... the final straw... one of my Arabian horses to a cougar. So I read and researched, when finally I did the most sensible thing and just looked around at all the other farms around us at what kind of guardians they had. Bar none, the most used LGDs around us are Great Pyrenees and I had liked what I read about them, so I found a farm that had both parents there, witnessed how they worked and picked up two female puppies (10 weeks old) from them. Later we added a male dog from another farm that helps protect our girls from "unwanted advances" by would-be suitors as well as backup for them.
Since adding them to the farm we've lost nothing... nothing.. period. Unless you count the guineas that packed up and left on their own.

We'd been told that you shouldn't interact with LGDs in order for them to bond with the animals and not just be pets. Well, I don't know about how others are, but ours bonded with the animals as well as us and guard us all. They are amazing animals and I can't say enough about our beloved Pyrenees. I'll never be without them on the farm again... even if I had no animals to protect, they are gorgeous dogs with wonderful personalities and I just adore them.