I love all the flock/guardian (not working/herding) dog breeds -- Pyrenees, Anatolians, Caucasian Shepherds, Ovcharkas, Maremmas, etc., because unlike working/herding breeds the guardian breeds don't chase after predators but stay with the flock to protect it. We had great Rottweiler herding dogs around horses but they had the tendency to leave the herd to chase after potential predators/invaders. There is something very protective about guardian breeds to stay with their owner/family members, their herd, their flock, and most have great instinctive restraint to resist abandoning their post to chase after invaders as most other breeds will tend to do. Although the protective instinct seems instilled in the guardian breeds it does not necessarily mean that every individual will be exactly the same -- some individuals within a guardian breed may be inherently better at the task than others. I would LOVE to have a Pyrenees or Ovcharka but because all the guardian breeds are in the 100+ weight range we can't keep one in our tiny cottage backyard. They require a sizeable property for exercise or have long walks every day so we opted not to get a dog. If we had a couple acres of free-range birds or had a farm I'd get a couple guardian dogs to work in tandem on the property. They may sit among the flock members and look lazy but they are ever-alert and on watch. I have not had experience with other guardian breeds but know owners of Pyrenees and Ovcharka and it is amazing how children roll around the floor and climb onto these tolerant gentle giants. In lieu of a flock, these dogs treat the family members as their "flock" duty. I had an occasion to dog-sit an Ovcharka who had no problem assessing that a stray rabbit in the yard was no threat and just watched the little bunny hopping along with no tendency to chase after it. Later that afternoon a coyote came to the backyard fence and the Ovcharka stood in front of me watching the coyote and never left my side until the coyote finally moved on. However, my DD's Pitbull mix left me to go chasing after a possum and no command training in the world would recall her!!!