Thank you for your response, Binki. I will definitely be keeping her warm inside today. I don't have any access to medicine right now since I live in the city, so I hope it's not an illness; I'm not even sure how to treat her. Hopefully her condition improves in the morning.
Today my only pet, a Courtnix Quail, has been acting very strange. She has spent all afternoon, with her feathers, all puffed up, in the corner of her cage with her eyes half-closed and seemingly gasping for air (as shown in the video below). She has not touched her feed bowl, nor has she drank...