If you want to make a whole grain chicken food, google it and you can find some recipes. You will have to add some supplements also--it is not that easy to do. But I have thought about making some.
I feed Purina Flock Raiser only. My black sexies weigh out at 9lbs, RIR 8lbs, and Red Sexies 7lbs. Quail come in at about 1lb or more. It's all I feed from hatch to plate.