I'm wondering if they have developed a vitamin deficiency...ive noticed that I have to put them in front of the feeder for them to eat. When I do, they gobble up the feed as if they haven't eaten in a while. I'm wondering if my older birds are not letting them eat? I scrambled some eggs and spinach and fed it to just them this morning. Going to try that for a few days and see if there is improvement. They are having a very hard time walking I have noticed today, very stiff legged, and flapping the wings. It's only the 2 cockerels. The pullet seems to be doing ok.