The image of a child playing with a dog by tossing a ball and having the dog bring it back is timeless. The dog loves it, the kid loves it, and everyone is happy playing a cooperative game. In a more formalized form, a solid retrieve is required for advanced dog sports. Some dogs are natural retrievers, and will happily play the game for hours at a time. Other dogs don’t pick it up right away, but any dog can learn how to play, and learn to love the game.