Methods for reducing side-effects of feeding an individual are provided. The methods comprise administering to the individual a composition comprising an amount of bovine milk providing 1.0 to 1.2 grams of protein per 100 available kilocalories and an amount of a bovine whey material providing 1.0 to 1.2 grams of protein per 100 available kilocalories, said bovine whey material having an alpha-lactalbumin content of 28% to 40% and a beta-lactoglobulin content of 8% to 33% of total protein.