In a couple weeks, I plan to get an LGD puppy (Great Pyrenees, most likely). Before then, I want to learn as much as possible about training the dog to guard my chickens. We have 90 acres, although I want the chickens to stay mostly in our yard and around the barn. Guarding the chickens will be the LGDs only job. Does anyone have any suggestions for books, videos on training LGDs? Thanks!