Purina Oyster Shell Chicken Feed, 5 lb. is an essential calcium-rich dietary supplement designed specifically for egg-laying chickens. If you raise chickens to enjoy fresh eggs for your family or to sell, maintaining their health and strength is crucial. Unlike other animals, chickens need unique nutrients, and this supplement provides mature hens with the necessary calcium to form hard, strong eggshells. Without sufficient calcium intake from Oyster Shell, chickens may start to leach calcium from their own bones, leading to weakened and brittle bone structure. Purina Oyster Shell supports laying hens by giving them the extra calcium boost required to keep their bones healthy and produce strong, uniformly shaped eggs. This product comes in a convenient 5 lb bag, making it easy to provide your flock with the nutrition they need. Model Number: