I have a new hen (rescue, found in someone's backyard!) who seems to have some kind of respiratory problem. There is a nasal discharge, and she sort of rattles when she breathes. She doesn't seem very interested in food or water, and it looks like she had some yellowish diarrhea. Her crop is empty now. She looks like a RIR, at least a year old. I have her in quarantine in the house right now, with a heating pad on low to keep her warm. Going to a vet is not an option, but I could probably get some basic feed store drugs if that would help. Has anybody else had this sort of thing? What did you do, and what happened? She seems like a sweet hen, and I'd like to take good care of her.