This morning my Marguerite, a gold laced Wyanadotte, is looking sickly with a faded comb, gone almost purple. Her tail is down and all her feathers are slouching. She is not herself, inactive, and doesn't seem interested in greens or scratch. In the coop, I did notice diarrhea which is greenish and quite smelly. She has a few tendrils on her bum but nothing cakey. She is 22 months old and has not yet molted. Her egg laying tapered off a month ago but in all other respects she has been her normal self prior to today. The weather in the coop was cold last night but did not dip below 30F. They have a heat lamp for extra warmth. Foodwise, my girls eat organic layer crumble. Treats are corn scratch with black oil sunflower seeds. Treats over the last few days have also included bits of broccoli, cauliflower, wheat grass and lettuce. Currently I have her separated from the other girls, sitting in a box in the sun convalescing as I try to figure out what is ailing her. My other Wyanadotte, and two Golden Sexlinks are just fine.I'd like to treat her myself if I can do so with certainty. I've just given her a few warmed oats with apple cider vinegar. Any thoughts on what could be going on? I'd really appreciate any advice or direction offered. Thanks in advance, Just Wingin' it.