I feel pretty much like Jim Legg when it comes to Dez's shows. He illustrates gun safety very well. I recall an older Hunting With Hank show with some teen aged young men whom Dez apparently knew fairly well, I don't remember if they were relatives or not. He was pretty firm about safety issues, and that's good to see. I also wish he would refrain from singing as much as he does. If he started out in his adult live as a singer, as someone above suggested, it's easy to see why he changed careers. The rug is comical, he would be better served to leave it off and act his age like the rest of us Olde Fartes.
Dash is indeed a good dog. I don't know if Dez if the only trainer, or if he has someone else do the bulk of the training. If he is the only trainer, he does a good job of that as well. Hank had the better nose, I believe, and was a better all-around dog, I understand he died a couple years ago. Hank may be the best bird dog I have ever seen. Dash is good, but not that good.
Most of my guns are of European make, and have either Greener or Kersten bolting. Brian above is right on, you don't close them by gently easing them shut. If you do, you won't have another shot until you open it again and close it properly, not slamming, but closing it with authority.