Abstract
The correction of apparent essential amino acid imbalances in two early-weaning rations and in an 18% protein starter ration by the addition of appropriate amounts of methionine and isoleucine did not enhance the biological value of such rations for pigs. A 20% protein early-weaning ration was not adequate for pigs weaned at 2 weeks of age. The minimum nutritionally satisfactory age for changing pigs from an early-weaning ration to a conventional 18% protein starter ration was 6 weeks of age, and the recommended level of protein in the early-weaning ration was set at 24%. Copyright © . .