Two groups of normal fullterm infants were studied from 8 to 112 days of age while receiving formulas of the same caloric density and prepared from the same ingredients. A limited selection of strained foods were permitted. From the combination of formula and strained foods, one group received 29% of calories from fat and 62% from carbohydrate whereas the other received 57% from fat and 34% from carbohydrate. Fifteen infants in each group completed the study as planned. Energy intakes per kilogram and rates of gain in length and weight were similar in the two feeding groups.