When I'm using a forced air dryer on the dogs I stuff cotton balls in my ears and theirs. They aren't spooked by noises really, but they definitely seem a lot more comfortable with the cotton in. Just don't forget to take it out.
Oh cotton balls. Good idea. Reason I am asking is because we do a lot of target practice with guns and since we usually just go up a mountain the dogs always enjoy coming with us. So I thought some kind of ear protection would be a good idea.