Purina® Start & Grow® Non-Medicated crumbles is a Chick Strong™ Feed. It includes the optimal combination of the 38 nutrients chicks need to grow and develop into happy, healthy hens. Purina® Start & Grow® Non-Medicated crumbles provided optimum nutrition for raising laying chicks from hatch to laying age (18-20 weeks). This complete feed with 18%- protein and quality nutrients is perfect for a strong start and early hen development. Formulated with prebiotics and probiotics to support optimum digestive health and immune function