Some children do out grow it. She is 5 months old and seems to do very well with infant formula as you stated. Her weight is on the 90th percentile and her height is on the 50th percentile for her age. Suggest just feeding her only infant formula (increase the formula amount if you can) and no baby food for a few more months. The above feeding method follows how some breast feed infants are feed only breast milk until about 9 months old then are introduced regular finger foods. At about 6 months old, then slowly reintroduce foods and see how she does. Hoped this helped you.