I have 15 1 week old cornish cross hens that look terrible. Most are bald on the butt and stomach and a few on the wings. I am feeding them a high protein broiler mash and today they ate cut up boiled eggs. They are all eating and drinking (with Sav-A-Chick) fine. I change the entire brooder daily. I have them outside on the grass for 2-3 hours a day and they love it, it's very warm. Why do they look so awful!?