A most tiresome subject and one I hate. I gave some chickens some time ago to a freind of mine and it turns out he cant have them in his neighborhood. Someone ratted him out and AC came knocking. I told him he can bring them back. I have them in a Quaruntine pen. They are laying as he told me they were but they are egg eaters. Evidence of many eggs being eaten. I am not sure if they are all eaters or not. There are five older hens which I suspect but have no way of knowing. I looked at their dirty little faces and so no evidence. The rest of the hens are much younger. I started by putting the older birds in another pen hoping that I have the culprits. Is there any likely hood that it is the older vs. younger hens? I guess I will be building a roll out nest box.