Infant formula products are mostly produced using protein from cow milk; goat milk also has a good source of protein. Owing to variations in protein content between human, cow, and goat milks, infant formula was formulated to be as similar as possible to human milk. In this study, goat and cow milk infant formulas were prepared by adding α-lactalbumin and it was directly compared to commercial infant formula protein digestion using growing rats. The nutritional value of these formulated diets was evaluated by estimating their proximate composition, the protein efficiency ratio (PER), corrected protein efficiency ratio (CPER), net protein ratio (NPR). The composition of the formulated diets indicated that satisfied legal nutrient content regulation and are within the range of recommended standards. The PER, CPER and NPR of formulated diets did not significantly (P>0.05) different and much closed to those of control. It was observed no significant difference due to milk type in the quality of protein. The protein quality of the formulated goat and cow infant formula were well comparable with those of commercial infant formula, the common infant diet over the world.