So, when I give my hens some weeds in the summer time, I want them to eat them. But when I give them the last of the Brussels sprouts leaves in the winter -- I really want them to eat them, not trample them. I made this manger out of chicken netting. It is slightly funnel shaped, and wired shut at the bottom. I have it a little higher than chicken-head height. Put greens in the top, the chickens can peck them out through the sides. It works pretty well! Here's my two barred rocks munching on Brussels sprouts leaves.