I have a Egyptian Fayoumi she is not a year old yet, yesterday I went into the coop and she was laying on ground. When I picked her up and set her outside she couldn't hold herself up and fell over. I took her inside the house. I'm in Chicago and don't know if the cold weather has anything to do with this or not. She is eating and drinking fine, she tries to get stand up and just falls back down. I don't see anything wrong with her legs, no cuts, marks or swelling. Does anyone know what this could be or what I can try to do to help her. Thank you!!