Last week the heavier twin, Joseph, began to have green watery stools and was very fussy all day, even while nursing. I was told that the green stools could be caused by a lack of fat in my diet. I am not on a weight loss diet. She is a Board Certified Lactation Consultant, as well as a retired La Leche League Leader. You don't need to be concerned about occasional green stools in breastfed babies who are healthy, happy and growing well.
Green stools can be the result of a foremilk-hindmilk imbalance.
This may sound complicated, but it really isn't. When a baby receives a large quantity of foremilk he may want to feed frequently. When a nursing baby's mom has a very abundant milk supply, green stooling can be quite common. To help remedy this situation, and allow your babies to get a more balanced feed, you might try offering one breast per two to three hour period for each baby. If your babies want to nurse again an hour later, return them to the same breast.