Happys is more of a retreiver then any retreiver breed lol at 10 weeks old she was bringing us everything from stuffies, to balls, to fish water jugs! lol she is extremly obbessed with balls lol she runs flyball for no reward because to her absolutly NOTHING is better then a tennis ball lol Misty likes then but is not as obbessed as Happy, Ripley...we had to put all the tennis balls away in a closet because he will find a bal and use it to get treats, because hwo he was trained to take the ball for flyball is that when he held the tennis ball, he got a treat, and that is how it still works, he gets the tennis ball only to get the treat, so now any tennis ball he see's he grabs it, runs to you, holds it in his moth and clawing at your arm and crying lol Perky is not interested, and Blair likes everything balls included lol