PurinaFormulated to meet the niacin requirements of growing and laying ducks Feed as sole diet from hatch for duck's entire lifeContains prebiotics and probiotics40 lb3004428-205Purina Duck Feed is specifically formulated to meet the elevated niacin levels ducklings need to grow and adult ducks need to maintain proper health. Should be fed to ducks as their sole diet from hatch for their entire life. Supplement laying ducks and geese with Purina Oyster Shell. Purina Duck Feed Pellets should be offered continuously as the sole diet to ducks starting at hatch and continuing for their entire life. Laying ducks should be offered Purina Oyster Shell in a separate feeder in addition to Purina Duck Feed Pellets while laying eggs. The oyster shell can be removed once the ducks have stopped laying eggs for the season. Store in a dry, well-ventilated area protected from rodents and insects. Do not feed moldy or insect-infested feed to animals as it may cause illness, performance loss or death. USE ONLY AS DIRECTED.