Once a month for the past three months I have had a chicken suddenly go lethargic and stop leaving the cvoop, refuse to eat or drink, and die within a couple of days regardless of what I do. Last month I gave one Tylan and she seemed much better. We thought she weould make it but she died. I think she starved and I got her eating too late. Tonight I am holding another one. Totally lethargic, eyes closing, refusing anything I offer her. If they had something contagious wouldn't I be losing them closer together? Anyone have an idea on how to that them? They were all wormed a month ago when Emma died because I did see worms in her poop but none of the others. Also, this one seems really red around her comb and beak but her feet are totally white. She can't seem to hold her head up.