Bearded Hen Small Bird Calcium Carbonate is an all natural source of calcium for young poultry fowl and small birds alike. 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, helping to increase the flock. Calcium overall promotes healthier bones, feathers for male and female birds alike. The added fine ground limestone calcium in a grit form helps maintain proper digestion in poultry and fowl with gizzards as well. This specially ground calcium limestone has a fine grit feel and should accommodate most small birds. This product is from a U.S. Quarry, not brought in from over seas. Proudly dug, ground and packaged in the USA.