You don't need to give oyster shell supplement if you use the Purina Layer Pellets. They are in a brown 40lb bag at TSC. They are a little more expensive than the Layena pellets, but you don't have to supplement oyster shells so it balances itslef out price wise. Also, ive read if you have a lot of room and your chickens free range than Oyster shells aren't neccessary. I don't know if that's true or not.
