I have 4 chickens and have noticed that one of my chickens sounds like she is gargling, sneezing a bit and a possible cough? My husband said that her legs look a brighter yellow also. I only noticed this today but my husband said that he heard the gargling sounds a couple of days ago. She is still eating and roaming around with my other chickens but I'm not sure what to do about this? Has anyone else had this problem or can offer me some help??