Celtilait manufactures its milk replacers from milk collected in breeder’s farms. Once processed, dairy raw materials are incorporated in formulation of milk replacers (such as skimmed milk powder, sweet whey powder coming from Emmenthal Cheese), quality is therefore steady. We use vegetable fats for their appetability and their digestibility. They are incorporated through the Spray drying process. This specific refattening method favours good conversation of feeds (by avoiding oxidation risks) and good dilution. A least, quality of raw materials in milk replacers ensures a good stability of the reconstituted milk.