Friend has a mutt that is deathly afraid of the sight of a gun, not just the noise. He will try to dig a hole through the concrete basement floor of the lodge if someone walks in with a gun visible. Owner has tried and tried to get him comfortable with guns, but he is not about to buy in to those guns.Training the versatile hunting dog by chuck johnson talks about this process, and is followed by many. I highly suggest it. I actually just finished the book. If you wanna borrow it you’re more than welcome to. Starting with loud noises like banging pans when they’re eating is a great way to start, and working your way up from there is best. Starts at birth and goes from there. The earlier and more cautious the better. Being scared of gunshots isn’t as easy to untrain.