This is the second hen we have with these symptoms. The first one ended up dying about 3 months ago, this one seems like it is headed that way any day now as well. They start out being lethargic, sleeping a lot standing up, comb flopping over and going pale. The first time this lasts about 2-3 days, then they snap out of it. It could be a week or two later when it happens again. It keeps happening, lasting longer each time, for about 2 months until the hen can't snap out of it and passes away. The hen gets very thin, not interested in eating, stools are very very watery (basically it's only water because there is no food going in). When the second one came down with this, I gave her a dewormer right away to see if that made any difference and maybe that was the issue but there was no change. I am stumped, and since this is the second bird with this, am wondering what it is I'm dealing with. No other issues - breathing normal, no mucus from the eyes or nose. Any thoughts?