shooting over dogs

so here's a question for ya. I used to have dogs that did not really care if you shot a gun around them. Then a while ago I had a dove hunter on the next property pepper my kennels with birdshot. He hit a couple dogs, and me ( I was cleaning kennels at the time). Nothing serious just stung them. Still made me pretty mad. Now if they hear a shot they are headed for the pickup. How would you go about curing that? Same as you would starting one out? I don't plan on baying and shooting a lot, but i would like to be able to throw one dog in the back of the pickup when I go fill feeders or something and just let them loose to hunt while i do.

I'm concerned that if I shoot a hog in front of the gunshy dogs they're gonna get spooked every time I get close to a bay thinking they're gonna get peppered again.