I have four chickens that just turned one year old- an Orpington, Australorp, wyandotte and Americauna. Two are low on protein and have been pulling their own feathers. At first I thought they were pulling each others but I separated them to assure it wasn't. One has sores on her wings because she relentlessly picks at them. The two that are separated are continuously getting 18% feed vs 16% feed now. Anyways, I have been trying to add extra protein to all of their diets but don't think it's enough. I scramble two eggs every couple days and give them each half an egg. I feel like its not enough but I don't want to overdo it either. Is there a "safe amount" for snacks? Like half a cup per chicken per day? A quarter cup? Please help!