My pediatrician told me that babies need between 600-800ml milk a day after start 2 solid meals a day. That's the amt my son is drinking. My son is 10mths. Sometimes when he's fussy he'll only drink 500ml. My pediatrician says that milk should be their main source of protein intake for at least the first yr of life. Currently my son is not yet taking protein foods like tofu, chicken, egg or fish.