Antibiotics for children can also make their poop green because these medications can change the stomach’s bacterial flora, leading to a slight change in poop color to greenish (10). 2.

When a baby drinks formula, their poop tends to be light brown or orange ... Learn more about green poop in children. Red is not a healthy poop color. Poop is usually red because there is blood ...

Medically reviewed by Qin Rao, MD Noticing grey poop may come as a surprise, but it's not always an emergency. Grey poop occasionally happens when you take certain medications for long periods. More ...