I had a conversation with my vet about my dog's sensitivity to loud and/or sharp noises. While fear/timidity is a common emotion in reaction to such sounds the vet pointed out a different issue: given a canine's sensitive hearing it's possible harsh noises do more than cause fear, they might cause pain.
Always give a pup an escape route from bothersome sounds...
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins
-- Chet Atkins