I think you should create a good balance between regular milk and comida . when my baby was one month old , his dietition gave a very bad regim to him . when his phe was up , she said you should give him 18 bushel formula and 3 bushel regular milk . when the phe was down , she said give him 18 bushel regular milk and 3 bushel formula. and we decided to give regim to him ourselves . then it was good . when your baby phe is so low , it means that you gavehim a lot of formula . so you should reduce the amount of it. and in these situations the best dietition are parents .