Pro-Form 18% All Purpose Poultry Crumbles may be fed to all types of poultry including laying birds. Laying birds may be provided with supplemental calcium through free choice limestone or oyster shell, particularly free range birds receiving supplemental scratch grains. If birds have been vaccinated or are subject to other stresses, feed a medicated feed for a period of at least 5 days to assist with recovery. Always provide ample clean, fresh water. For further information, please refer to the Pro-Form Feeds Poultry Production Guide available at your local Pro-Form Feeds dealer.