One of my NH reds has been looking increasingly listless and pale around the face lately. She has been becoming more withdrawn from the rest of the hens and last night I brought her in the house in a separate cage. She sits puffed out and is not eating. Her comb was standing up yesterday and today it's flopped over to one side, I am assuming she is dehydrated. I have not seen her drink. She is having some nasty foul smelling diarrhea and sits with her eyes closed most of the time.

Does anyone have an idea what is wrong with her?

I think our treatment window is closing quickly....

Not sure if it's important but she still looks like she is molting.....feathers come off when you touch her and there are many in the cage as well.