Description Poultry Grit is made from a variety of different seashells. Oyster shell helps hens form strong shells on their eggs as it supplies them with a very good source of calcium. If you find your hens eggs are thin-shelled and prone to breaking, they are probably lacking in calcium and should be fed grit. Poultry grit aids their digestion as it helps to grind up their food. 25kg bag.
