I'd say that's a sign of a pretty smart dog frankly. It means he's thinking both concretely and abstractly, and knows that places and things are associated. I've met some dogs that don't have the first idea of anything, and think that if it quacks like a duck, it must be a squirrel. You should see some of the dogs here in LA; it's like they had lobotomies at birth.
....Mind you, I wear a much bigger belt now....Def
Dunc , Are those rigid keel Avons in the pics ? How are they ?