就是如果还没有到hindmilk,全是foremilk的话，脂肪含量不够，宝宝吃不饱，大便会发青。

When the mom has a very abundant milk supply, the baby is getting an abundance of foremilk and not much hindmilk. This can cause fussiness(colic), gassiness, green frothy stools, unhappiness at breast and breast refusal. A baby who is getting too much foremilk may want to feed frequently or for very long periods of time. He is often getting a high volume, low calorie feed.

半岁过后长牙了胃口不好，就不长或长很慢了，开始走路后热量消耗大还会瘦。