A blend of both soluble grit, which ensures good, strong and attractive egg shells, and non soluble grit, which stays in the bird's crop to aid digestion of food. Poultry need a supply of grit to enable them to digest food effectively. If they free range for much of the time they should find enough naturally but if they are kept in a run they may benefit from an additional supply
A form of soluble grit with a slow rate of calcium release. This should be fed whenever you are looking for strong, good quality and consistent egg shells. It also increases the bone strength of the bird.