Purina Oyster Shell

Features & Benefits Research-proven feed Purina® has been conducting poultry research for nearly a century. We have a flock of backyard birds at the Purina Animal Nutrition Center to help our nutritionists, feed formulators and flock caregivers evaluate our feeds before we put them on the market. Added calcium When complete layer feeds aren’t accessible or during times of stress for your birds, Purina® Oyster Shell provides an excellent source of supplemental calcium. Mixed flock For egg-laying chickens and turkeys.