Theoretically speaking, could green poop be caused by an allergy to breast milk for an breastfed infant starting after four months of breastfeeding? I don't know if that is even possible.
Infant poop is usually yellowish, but what if it were foamy and explosively or dark green and very runny. Could an allergy to breast milk cause this?
I've heard that it could also be the result of a common cold virus infection which may affect the infants stomach. Has anyone else heard about this?