I feed my chickens until they are full but they are still under weight. Ok I ordered some chicks off the internet. I feed them about twice a day. I give them a big tub of water also. They are in the same pin as the ducks and they love it. Occasionally they will fly out but not all of the time. At night I go get them and put them in the rabbit cage. I can feel their craw (is that what its called) and its full and feels like it will bust. They are also black Sumatra's. My Turkens are the same age as the Sumatra's but they are about two times bigger. I got them around Easter. But is there something I can do to help them get bigger? I also feed them scratch grain and they do have a big pen (although the grass is wore down). The first two months they ate nothing but chick starter and they got to play FREE RANGE out side.