Baby poos

You may find yourself wondering about your baby’s poos and what is normal. Your baby’s poo is a good health indicator and there are things you can look out for to make sure it’s normal.

Breastfed babies’ bowel motions

Breastfed babies poo at least once a day until 4 weeks of age. After 4 weeks some babies do poos at every feed, others only every 7–10 days. It’s normal for babies to suddenly change their pattern. Their poos are often runny with small lumps.

Formula-fed babies’ bowel motions

Formula-fed babies usually poo every day or every second day. They tend to have firmer-formed poos.


The colour of poo can vary from yellow to green to brown. Green poos are common in a well baby. However, sometimes the green colour may be caused by a feeding problem or illness. If you are worried, talk to your midwife, Plunket nurse, or doctor.


A baby’s poos should be soft. When your baby is constipated, their poos are hard and difficult to pass. If you’re worried your baby is constipated, you can read more under Health Conditions.

Always wash your hands after changing your baby’s nappies, to prevent infection.

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