She is 2 1/2 years old, and a great egg layer but a very late molter. She just molted recently and now is very lethargic, her comb is laying over and starting to turn sort of black. She seems to eat some and drinks well. Has whitish poop on her hind end and sits around (not on the nest) a lot. She has not layed in awhile. She is a BR and I have 15 other hens 8 the same age and 7 that are almost 4 months old and the babies of these girls. I don't want the rest to get something if it is contagious.