A baby who is only a few days old has green, smelly, and granular stools. How?

Patient's question:

No

Doctor's answer:

If a baby's stool is dark green, it indicates indigestion. When the stool is acidic, bile contained within it oxidizes in the air to turn green. Bilirubin in bile is a yellow pigment, and when it stains the stool, it turns it yellow. After oxidation, bilirubin turns into biliverdin, which makes the stool green.