I have seen some threads here in the past where a chicken died and had a necropsy where aspergillosis was diagnosed. They were the only chicken in the flock with it. But this is just speculation. I hope that she pulls through, but if she doesn’t make it, get a necropsy. That is the best method to get a diagnosis. I would worm her with the SafeGuard for 5 days. If you can get a weight, give 1/4 ml per pound.