Bearded Hen Triple Calcium & Grit Supplement gives 3 sources of calcium options and granite gizzard grit to adult poultry and game birds alike. Triple Calcium: Crushed Oyster Shell, Granular Limestone and Coral Calcium. Added calcium strengthens egg shells for egg laying hens, producing healthier eggs in an egg production setting or promoting egg strength in a wild game bird setting. Calcium overall promotes healthier bones, feathers for male and female birds alike and a healthier flock in general. The added crushed granite grit is insoluble and helps maintain proper digestion in all poultry species. Grit is needed for the gizzard and having access is essential for proper digestion. Made in the USA!