gotcha
usually when a dog is between your legs it's not a good thing for their confidence building. We don't know much of anything from a picture other than the dog is between your legs and in pretty close proximity to high power rifles going off.
Imagine turning your hearing up a few notches then pulling the trigger on a rifle w/o protection, it's going to be unpleasant.
If you got to wear hearing protection (or should be rather), then the dog doesn't belong there.