I have a Maremma Sheepdog and simply love him. He is almost the size of my Great Danes. I've had him since he was a pup and it took him a while to learn that the poultry are not play toys. He does fantastic with them now and even runs off my worst predators, ravens. He is very active both day and night. I love watching him "patrol". He'll do a complete circuit inside the fence and then position himself as high as he can overlooking the swamp. I know he has driven off a fox on several occasions and deterred a hawk from getting any of my birds. But, as someone pointed out, you either need a stout fence or a lot of acreage for these guys. Diesel, if given the chance, will happily "patrol" my neighbors' properties too.