Starting from day 2 of life, calves can begin taking this Producer's Pride 20-20 Calf Milk Replacer to get the nutrition they need. This milk replacer is scientifically formulated with all the nutrients that calves need to thrive in their first days, weeks and months on your farm. It contains 20% protein and 20% fat content, and is a good source of fiber, calcium, vitamins A, D, E and more. When used as directed, there's no need to incorporate additional vitamin supplements into their diet. This calf milk replacer is easy to prepare by simply mixing the powder with warm water, then cooling and serving. Milk replacer calves are generally weaned between 8 and 12 weeks of age. This formula is non-medicated and sold in 25 lb. bags.