Duke met my father for the first time today. My father loves him already, and says that if we have any problems with Duke, he has a home (like we need to be concerned about that). My wife and I both love the dog, so he's staying, but a hardy mix like this would be great for my father. He's 83, but he lives alone, takes care of his place, his apple tree, grounds maintenance, gardening, etc all by himself, and he walks at least 3-4 miles a day for his own fitness. A nice dog like Duke would be a great fit for someone like him. Big enough and hardy enough to walk every day under some adverse conditions, big enough and loving enough to be a great home-defender should the need arise, and still loving and sweet enough to tolerate all the great-grandchildren.