I found an Agway store that mixes their own feed for almost half the price of what I pay now for Dumor Unmedicated at TSC. They said they mix corn,soy,calcium and mineral block. The amounts of protein are correct for the layers.My hens get free choice oyster shell as well. My question is, if I add 10% scratch grains to this mixture, will my birds be getting what they need? They do get lots of fresh foods too but I don't want to switch over if the feed is not good enough compared to what I am getting now. sigh....wish i could just afford organic!