Ok...so I feed my chickens a 20% protein feed. They don't actually "free range" however they have huge gardens in which to mill around in all day. So they eat other things other than layer feed. So my dumb question is....How much feed does a chicken eating 20% protein feed have to eat to get 20% protein from it? If they eat less than the suggested serving of food, do they get less than 20% and if they eat more than that serving do they get more than 20%??? Thanks all. I have always wondered how all this works!