Tana could seemingly care less about noises, nothing seems to bother her, not even a shotgun being fired about 50 feet away a couple weeks ago. She was more interested in wanting the varmint two of my other dogs had put up a tree- which is what I was shooting at 😉 As skittish as she was when we adopted her from BRAT (she was a puppymill dog) she really has turned out to be very laid back about a lot of situations 🙂
Jibini on the other hand, is weird. As a pup he didn't seem bothered by much- growing up in Florida he was accustomed to thunderstorms but when he was 6 or 7 he suddenly started getting a bit nervous/agitated by the sound of thunder….mostly pacing and whining. And now at age 11 he's not nearly as bothered by them as he was a couple years ago; he may whine and pace for a few minutes but is usually content to snuggle under a blanket and sleep it out. Fireworks definitely bother him and that started a couple years before the thunder anxiety. He isn't thrilled about gunfire either. But other loud noises don't bother him- when I drove a truck he was exposed to a lot of noisy situations- I could walk him through a busy truck shop and not even an impact wrench going off 10 feet behind him made him flinch.
I guess some dogs are pretty selective about which noises they'll react to- I know I've seen hunting dogs who were scared to death of thunder and certain other types of loud noises, but absolutely steady to gunfire.