I suspect it has a lot to do with dogs, which are descended from wolves, being pack animals. Consider that you can take a dog for a walk, but generally can't with a cat; this is because, to a dog, its owner is really just the "leader of the pack", and it'll follow the leader pretty much wherever. As an example, a friend of mine used to have a dog, Barney, which was half black lab / half Newfoundland (yeah, Barney was huge). One day, my Dad looked out our front window and saw him walking along the street, alone, trailing a leash. Thinking something wrong, my Dad went out into the street, said, "Come here, Barney," and patted his leg. Barney stopped, looked back at him, but didn't move. My Dad then said, "C'mon, boy, let's go home," and started back towards my buddy's house. Barney then adopted an, "Oh, OK!" posture and followed him the block or so to my buddy's place. It turned out he had been hitched up to a clothesline in the back yard, had got loose, and just wandered off; there was nobody home. The interesting thing is that, as far as I know, my Dad had never spent much (if any) time with Barney, but because he had taken the position/attitude of Leader Of The Pack, Barney's "pack" nature kicked in and he happily followed him home. (Cats, on the other hand, are descended from "lone hunter" animals, with the exception of species like lions.) Aloha, Brad