The importance of Grit in the diet of most poultry can not be under estimated, it is a necessary supplement for chicks as well as your mature chickens.
The need that birds have for grit varies depending on your chicken’s diet and whether or not it is a free range bird. Chicken grit is simply small rocks or crushed shells from various sources which you add to your flock’s diet. These rocks are rough in texture which is much more effective in grinding food than smooth stones would be. They also provide minerals and calcium to help keep the shell strong and regular.