I have switched my 12 week old hens over to the grower/finisher or what ever you call it, and they will not eat it. They are literally starving themselves. They will eat the chick starter, but wont touch the other stuff. I finally caved and gave them the chick starter back today because of how thin they have become. I dont know what to do, they need to eat, but at the same time they can not stay on the chick starter? I feed pulin, and or purina when my brand is out. What should I do? I do see them eat when they are hungry enough, but they are getting so thin and I hardly ever have to fill the feed bowel...Any ideas?