BTW... while I happen to be a big fan of Water Dog and Game Dog, they pale in comparison to either Mike Lardy or Smartwork. They are great when one of the more expensive options is NOT an option, but they are so much more in-depth and technical.
If you are dead serious about training a great hunting retriever, get Lardy or Smartwork. If you suspect you'll be more casual in your approach but still want to do something, Water Dog is the better choice of the two Wolters' videos. Game Dog is more of a watered-down version of Water Dog.
"I'll start spending less time with my dog and more with my wife when she starts fetching ducks for me"