Help your laying hens be their most egg-cellent with Small Pet Select Oyster Shell Chicken Food. Laying eggs requires a lot of calcium—this all-natural oyster shell feed helps to give mama hens some extra calcium when they need it most. Since oyster shells are digested at a different rate from normal feed， the calcium will be available overnight—the time when hens usually build eggshells. These thinner-crushed shells are ideal for feeding on their own or mixed into your hens’ usual feed. And aside from helping to create strong eggs， the calcium in this supplemental feed also promotes healthy plumage.