Pigeons
The key to teaching a dog to hunt properly is pigeons. Nothing works as well. They have a lot of scent. Dogs can find them by scent easily. They are strong flyers...and YOU control the situation.
Go ahead and hunt this season. But, if you want to train a hunting dog to hunt with you and for you it is the work you do in the off season that will get you the results you want. Doesn't matter how old the dog is.
This book isn't in print any more. I talked to Jim about doing a re-print but he was too old and not interested. But you can see by the price for a used copy that it is highly prized.
http://www.amazon.com/The-Burnt-Creek-method-training/dp/B00071DEJQ
However, the Silent Command System is a close second.
http://www.amazon.com/Silent-Comman...=8-2&keywords=the+silent+command+dog+training
And Rick Smith will tell you that what you want is the "good enough" dog. Get the dog to the point that he will hunt with you, hunt for you, sit, stay, and come when told, and retrieve the birds. Hand signals, and all the rest are nice additions, but get the dog trained so you enjoy hunting with it.
I spent a good 30-40 days in the off season training my setter, and although the field trial guys would say I have dog with a lot of "potential"...I love hunting with my dog. It is pure joy. He makes mistakes, but not many.
My last outing he pointed 5 birds. I knocked down all 5 and we found 4. I hit the rooster we lost a long way out with 7 shot (we were in quail looking cover) and I saw it take off running. My fault for shooting so far with light shot at a rooster. But, Murphy pointed them all and retrieved 4 of 5....good enough.
Sorry for being so long winded. But, one last time....great bird dogs are trained in the off season.