I have 5 Buff Orppingtons. One has been very lethargic, never really getting up out of her laying box unless I physically move her. Her feathers are fluffed up like she's freezing, her comb is much paler than the others and she smells like she's rotting. I was able to get her out in the pen today and she was weirdly scratching her feet around while she was pretty wobbly. I have no idea what might be wrong. The other wierd thing is that the egg production of the others has seriously dropped off even though they have none of the same symptoms. I have attached a couple of pictures.