Hello all - this is my first post but I've been reading these forums for advice for months and can't thank you all enough for your help. I have (well, had) 6 Easter Eggers, all 7-8 weeks old, on medicated starter crumbles. One of them showed some mild symptoms starting a few days ago - sometimes listless/puffed up, and squinting. But I watched her and made sure she was eating and drinking, her vent was clean, there was no odd breathing or discharge from her eyes or beak. No sign of bloody droppings, and I clean the under the henhouse roost daily. She also had periods of normal activity as well. So I figured I'd monitor her and leave it at that. Last night was the chickens first night with access to the run. They hadn't gone back in by sundown, but the run is predator-proof and dry, so I figured I'd let them figure it out rather than stressing them out further on their first day "outside." This morning, 5 of my six chickens were roosting in the hen house, and the seemingly mildly ill one was dead in the run. I'm kicking myself here, these are my first chickens. Should I treat the whole flock with Coccid or electrolytes? Is there something else I should be doing for them? The other chickens seem fine, but then, the dead one didn't seem very sick either.