Drake and Doc are right! Don't get me wrong, I used Wolter's in training my very first lab, and his methods work well if what your shooting for is strictly a hunting companion that will get the job done, but if you are looking any further into complex retrieving and even the doggy tests and games, go buy Evan Graham's Smartworks series (2 volumes) I am a third of the way through Smartworks 1 and notice a big difference in these 2 methods.