Start with a blank gun. While your pup is eating, go into another room far off (or even outside), & pop a blank off. This is well done with a partner. When the blank goes off, pretend as if nothing has happened. Gradually (over the course of several days/weeks)work your way closer to pup. Eventually you will want to brimg this into the field. Every time you fire the blank gun, pretend as if nothing has happened. If youdon't make a big deal about it, neither will the pup.