A feed-stuff for young animals, particularly piglets, to be administered during the first weeks of life and comprising starch, vitamins, and minerals, whereby it has a composition which in general resembles the composition of the mother's milk with regard to the ratio of casein to whey proteins, the lactose content has been adopted to the lactose content of the mother's milk, that the starch present is gelatinized and is substantially free of fibers and other mineral and trace substance binding carbohydrate complexes, and it contains organic, acidifying compounds to maintain a low pH in the stomach.