Cal-D-Solve is a high-performance calcium/magnesium supplement, with added vitamin D3, formulated for maximum absorption in the gut and clear solubility in drinking water. Cal-D-Solve contains no color or flavoring and no preservatives. It is used when calcium deficiency is present or for chronic egg layers or birds producing soft shell eggs. Sprinkle lightly over fruit, vegetables, greens and/or seed or add to drinking water. Leaves drinking water crystal clear and tasteless. Cal-D-Solve provides calcium and magnesium. Magnesium is important in muscle and nerve development and is a natural addition to calcium supplementation. Vitamin D3 is added to improve calcium uptake. Cal-D-Solve will dissolve leaving water crystal clear. (This is important to assure that birds will accept drinking water) Note: Do not add Cal-D-Solve to hand feeding formula for baby birds