Thanks satay. No they didn't take a poop sample. There was no diarrhea in the box. Although this morning I just realised it's Nugget, my Sussex, who has a bit of a dirty bottom. I didn't take her to the vet last night as she was the one who didn't look sick (still has a good weight on her etc). There was no diarrhea in the floor of the coop this morning either though. Do you know what is normal in terms of dirty vent and when you need to start to worry? I've given her the same cocci meds as the other too, and also Moximax. Will get the Big L later today and put it in their water from tomorrow onwards as tonight is their last cocci med dose. I've also added ACV to their water this morning, and Protexin is on the way.