20% all flock feed, corn, wheat, and bugs as regular treats, dandelion greens and other fruits and veggies as we can afford them, and some oyster shells they can free feed on. They've been going nuts for the oyster shells lately.
I have never encountered a more interesting and challenging flock than the one I and my husband currently have. When we first got them, we were concerned about cannibalism because one of our birds killed a flockmate by pecking at her tail. That's stopped entirely now, but now my birds have begun...