If your baby has dark green and black stools, it depends on the number of bowel movements per day. If you have 2-3 bowel movements per day and the stools are paste-like, this is not a big problem. If there are no white blood cells in the stool or if the occult blood is negative, it proves that there is no inflammation in the stool and there is no need to worry too much. Some babies will have this color after eating milk powder, but after adding supplementary food, such as eating rice flour or adding egg yolk or vegetables, the color will gradually turn yellow. No matter if the stool is yellow or black, as long as the number of stools is normal and the nature of the stool is normal, it is within the normal range.