I just buried my fourth chicken today, from a flock of 9 down to 5. All have died within the last 4 months. Half of these hens were 3 years old, and half were 2 years old. Mixed breeds: RIR, Golden Sex Link, Speckled Sussex They have all exhibited similar symptoms: Stop laying Looking pale/sickly Poopy butts, likely from runny poop, but no blood Lethargic Dropping dead, usually within a week of initial symptoms. From reading other posts, I self-diagnosed this as possible coccidiosis outbreak, so I ran to the Feed store and got the balance of the flock started on Corid today. But my research implies that cocci typically affects younger chicks, so I'm not 100% confident in this diagnosis. After the first death, I scrubbed out the coop(s), and inspected the girls for insects. I also ran them through a course of de-worming, even though I saw nothing in the feces with my naked eye. I was preparing to add to my flock, but I certainly don't want to bring any chicks into this mess. Any thoughts or suggestions on what else might be going on? Thanks.