Went out to the chickens this morning and found our almost-2yo Buff Orpington hen raising her head like she was crowing, but a wheezing hiss sound coming out. Her crown and "gobble" are a funny color, too. We brought her up to the garage. It's like she has laryngitis. Her crop is empty, so she's not been eating. We offered her water and food, but she seemed to have trouble with it b/c of trying to breathe. My son said she just shook her head and some snot came out. Could she just have a cold? What can we do? We won't lose her over this, will we?