The concept of fetch is simple: throw a toy for your dog to get and return to you. It's a fun game that's easy for you and your dog to play together just about anywhere. However, many dogs will chase a toy after it's thrown but not bring it back to you, turning fetch into a game of "Keep Away." To keep this from happening, throw the toy, wait for the dog to pick it up, and then run in the opposite direction. He should chase you. Once he catches up with you, ask him for the toy and praise him when he gives it to you. He should quickly learn the proper way to play the game.