Zoo Med's Avian Calcium is a pure calcium supplement for all species of birds. Zoo Med only uses precipitated calcium carbonate which is white in color and is essentially lead free. Pure calcium carbonate is white, not gray. Impurities in other sources of calcium carbonate (e.g. Oyster Shell Calcium) cause the supplement to appear gray. The Calcium carbonate particles in Avian Calcium have a unique shape, and an extremely high surface area per gram, resulting in increased calcium bioavailability. With Avian Calcium, you can take comfort in knowing that your birds are getting a highly bioavailable source of calcium carbonate that is free of harmful impurities.
Calcium is essential for the formation and maintenance of strong bones, egg production, blood clotting and other vital life functions. As a general rule, calcium should make up one half to one percent of a bird's diet. Calcium should make up two precent of the diet of breeding hens which require additional calcium of egg shells