Have new chocolate lab, three years old, with great hunter bloodlines. He's not afraid of lawnmower noise, thunder, or truck engines whizzing by. I'm wondering if firing a blank pistol is the right approach to getting him used to the noise of a shotgun? If it is, what pistol would you recommend? Do you start with the pistol outdoors and link it to pleasurable food eating sessions indoors? Do you use it when honing the retrieve, firing it, then throwing the decoy?