This is my pup Tank's first year hunting. He is 15 months now and has progressed very nicely through training. The problem I have is that he breaks every time a shot is fired by shotgun. I train using a retrieve r trainer with yellow medium load. He does not break when this is fired and is rock solid. Today while hunting he broke even when other guys across the swamp were shooting, tearing his steak out of the ground twice before I put him up. After the hunt I took out the retrieve r trainer and put him back in the blind to see if it was the environment. Fired three shots and he was once again rock solid. I would like to know if anyone else has had this issue and what they have done to remedy it. Thanks in advance. Merry Christmas.