Manna Pro Oyster Shell provides a good source of calcium that builds strong eggshells for your birds. *OYSTER SHELL USAGE FOR CORN BURNING STOVES: Oyster Shell is recommended by some corn-burning stove manufacturers as an additive to promote clean burning, especially when the corn fuel is high in starch.
Insoluble crushed granite to help with proper digestion. Designed to be fed with coarse grains. For all classes of Poultry. Made in the USA.