So I have 17 laying hens and they have a run about the size of a horse round pen and a coop that is 20' by 6' . I feed them when the feeder goes emty and this happens about twice a day . I have a 25lb feeder. Where I live a 50lb bag of pellets cost $18.00. With the birds eating this much its making it hard on me, I am wondering if maybe there is another feed that still gives the birds all their nutrients but takes longer to digest or if I am just over feeding?