Purina® Layena^® 16% Layer Crumbles is a balanced and complete feed that provides 16% protein to support your hens’ health and keep them laying nutritious eggs.  Now with the Flock Strong™ System. The Flock Strong™ System proprietary ingredient blend helps nourish strong, healthy hens from the inside out. With live probiotics, prebiotics and yeast for immune and gut health. Purina® Layena® chicken feed is available in crumbles, pellets, or pearls which all provide the same high-quality nutrition.