Black poop in a baby: is it normal?
The short answer is: It depends. Sometimes black baby poop is perfectly normal, and sometimes it can be a cause for concern. The answer depends on the type of milk or formula your baby is drinking, how old they are, its consistency, and other factors.
When you first bring your baby home, their first few diaper changes typically feature a sticky, black poop-like substance that may resemble tar. This is called meconium, something that gradually filled your baby's system while you were pregnant, and the passing of it is not only normal, it's a sign that your baby's bowels are functioning properly.
Babies who drink iron-fortified formula may have black poop regularly in their diapers, and this is totally normal, too. Iron ingredients in their formula causes poop to turn a dark black color.
Cases, where dark black poop is not normal, is if your baby does not drink iron-fortified formula. Thick, black stools in 3-month-old babies (or older) can be an indication of bleeding in the digestive tract, and you should call your pediatrician right away.
Dark grey baby poop
Baby poop that's dark grey is a cause for concern. If you see dark grey baby poop in your child's diaper, you should contact your doctor as soon as possible. It could mean they're not digesting food as they should and getting all the nutrients they need. The same goes for poop that looks chalky and white.