I used a Lucky Dog dummy launcher that shoots a 22 blank and shoot a bumper. I use it with an older dog and let the pup watch from a distance. With the excitement of the older dog the pup gets used to the shot real quick. I even used this process with my Teckel (wirehair dachshund) who knows what a gun shot means, something dead. The wife had a blow out on a mower trailer (I over loaded it) and all 3 dogs went running out the fence looking for something dead