Grit is an important aid in helping certain birds digest food but (NOT for Parrots)Birds such as finches and canaries (Passerines) and even chickens, must have access to grit or sand to help digest seed.
Oyster Grit is a natural source of calcium which can be offered as a supplement to hens on an ad lib basis throughout the year. It may be added toother chicken feed or fed separately. Calcium is an essential nutrient for promoting good bones and egg shell quality.
