IMOP I would not waste the$$$$$ on fake antlers and the like. I have trained a few dogs. I have owned a few UKC titled labs.
I always find it best to use the real deal be it dead birds,pigeons, tree rats ,coons,antlers etc. Nothing works like the real deal.
JW hit the nail on the head reward them like they just brought you the winning powerball ticket and all will go well. The book Water Dog has a great section on blinds use antlers instead of dummies. I wish I could post video on here I would do a little demo on how to start.
Keith