Oz, you master of all things chicken disease: What causes a 9 week old chick to have yellow diarrhea with consistency of water? Mine were all fine yesterday, I found one this morning, extremely lethargic, just laid there... wouldn't budge. Wouldn't eat or drink, just kept pooping non-stop... He just died half an hour ago. I could feel every bone in his body, and I know he wasn't like that before (he was going to be dinner, so I check their fleshyness often). I cleaned the coop and kept him separate, so I'm hoping it's ok now. I have seen no issues in the others.