Funnily enough Rogue witnessed a firework show at a friend's house we were staying over at and was absolutely fine. (He stayed in house with the other dogs while the humans enjoyed the sight in the backyard)
It's deer hunting season in PA and while we were at the park last week day, someone was doing target practice near by. Rogue statued but I got him moving again with treats and praise. Didn't think anything of it. A few days later we went on a different walk and also heard gunshots in the distance. Rogue's whole demeanor changed. He started dragging behind me, wouldn't accept treats, and didn't want to smell or mark on anything. All I can think of is that it was a bit of PTSD from the first time he statued. Hunting season goes til Dec 9 so I'm hoping we'll get to work on it a bit. I'll just bring better treats.