What do I buy? What to do. I'm new at all this. My Barred Rock who had been laying consistently since the 9th of this month laid a shell less egg yesterday. Today she has diarrhea and a dirty bum. The diarrhea is greenish in color. No sign of parasites in the feces, no signs of mites, and she is eating, drinking and active. Is there a product I should purchase? My husband would have access to a feed store after work. We don't have much around our area in terms of chicken supplies. Thanks guys! Oh, in case it matters she has no new food, I've added a touch of cider vinegar to their water but this occurred prior.