Purina(R) Start and Grow(R) Medicated Crumbles feed provides all the complete and balanced nutrition chicks need for a healthy start and a lifetime of success. Includes amprolium to help protect chicks from coccidiosis: amprolium is not an antibiotic. For chicks and pullets from day one through week 18 that have not been vaccinated for coccidiosis. FEEDING DIRECTIONS: Feed Purina(R) Start & Grow(R) Medicated Premium Poultry Feed continuously as the sole ration from day-old until onset of egg production and then switch to Purina(R) Layena(R) or Layena(R)+ Premium Poultry Feed. Provide fresh clean water at all times. | Purina Start and Grow Medicated Crumbles Poultry Feed | Size 5 lbs