Purina® Layena® Crumbles is a16%-protein, high-calcium ration formulated with prebiotics and probiotics for laying hens 18 weeks and older to support optimal hen health and consistent egg production. Purina® Layena® Crumbles include our Oyster Strong® System for strong shells. Oyster shell provides another source of calcium when the hens need it most. Oyster shell is a larger particle size than limestone. This means that oyster shell will stay in the digestive tract longer and will provide a source of calcium for egg shell production over a longer period of time than smaller particle sources of calcium. This is especially important at night when egg shell formation is rapidly occurring and dietary sources of calcium are limited because the bird is not eating. Purina® Layena® Layer Feed is available in pellets or crumbles. Pellets and crumbles include the same nutrition, so choosing between the two is a personal preference. Pellets are a great way to limit feed waste.