This morning I went out to let the girls out, and I found one chicken making this noise when she's breathing. I picked her up and I see nothing wrong - nothing stuck in her nostrils, no wounds or any discharge from anywhere. She was acting normally otherwise, and ate the bread I threw down as a treat like nothing was wrong. Being a vet tech, my first thought is some sort of upper respiratory issue, but we don't really do anything with chickens - I have the most chicken knowledge of anyone there. Does anyone recognize these symptoms as anything, and should I be alarmed and be doing something to treat? She was perfectly fine last night, and no one else has any issues right now. Very concerned that this could turn into something much worse very quickly. Please help!!!