hehehe my Chocolate lab is my ball retriever. When im chopping on balls in the yard, he stands right in front of me and tries to catch them as soon as the ball leaves the club. Once in a while he catches them. If not, he goes gets them for me (granted though, they are full of doggie drool when they come back) but it beats having to go look for them. :-)
Would be kinda nice though to outfit one in the bag.