I have thirty (actually, twenty eight, but its really close) free range chickens, and they eat a LOT. They weigh at least five pounds and they are only nine weeks old. Im concerned, because we buy three bags of feed a month, which adds up to about forty five dollars a month, and they act like they are starving if I don't feed then two or three feeders full every day. (I have a one gallon feeder). Its costing more than I want it to, in stress and money. Please help!!