We did learn where he lives after the first few visits and also learned he likes to get loose for an occasional jaunt out to explore on his own as his owners have told us. Today he walked along with us the whole 2 miles running on ahead only to turn to see if we were coming, running back to us and then running out on his own again only to show up after a few minutes. He seems to be very confident in what he is doing and where he is going. We have never heard him bark, and he always looks like he has a smile on his face.
Both of us enjoy these little visits and will sometimes offer him some kind of treat, that's probably why he returns but, I like to think he enjoys our company just as much as we enjoy his. If only people could be as unassuming and friendly as he is we would have a much better world.