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Baby poo guide: colour and texture differences

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Let's talk about baby poo

Baby poo. Once you become a parent, it’s hard to remember a time when your baby’s toilet habits weren’t such an important topic of conversation. But the fact of the matter is, you’ll find yourself talking about poo. A lot.

With an average of 1820 nappy changes in your baby’s first year, you’re going to become very familiar with your baby’s pooing habits. And that’s a good thing, because you’ll be able to notice if there’s anything unusual.

Baby poo raises a lot of questions, such as how often should babies poo? What are the different types of poos? And why is my baby’s poo green?

All babies are different, so what’s ‘normal’ for your baby isn’t necessarily the same for another baby.  

Let’s take a look at what to expect when it comes to the colour, frequency and volume of that all important baby poo. Take a look at our handy baby poo chart to get started!

Baby poo chart

 

 Baby poo colour and consistencyFrequencySmell
Newborn1A sticky black or green poo called meconiumTwice or more per dayNo smell
Breastfed1,2Soft, yellow colour poos, sometimes with small seed-like bits in it

After each feed in the first few weeks

Once per day or less after about 6 weeks

A weak, sometimes sweet smell
Bottle-fed1,2Firmer brown or green poos

Up to 5 times per day in the first few weeks

Once per day after a few months

A stronger smell
Weaned babies2Firmer and darker brown  

Things to look out for2

Speak to your GP or health visitor if you spot any of these

Green poos along with a fussy baby

Hard, small poos

Very pale poos

Very watery poos

If you see blood in your baby’s poo, seek urgent medical advice as soon as possible. 

No meconium in the first 48 hours

Fewer than two poos in 24 hours up to 6 weeks

Very smelly poos – especially from breastfed babies
Medication2If breastfeeding, your diet or medications could lead to green poo  

Knowing me, knowing poo: what to expect

From how often a newborn should poo to what happens when they start eating solid foods, we’ve got the answers to your baby poo questions.

Baby poo colour: yellow, green and in-between

Your baby’s first poo is called ‘meconium’. It’s a sticky, blackish-green poo that they’ll have in the first couple of days after birth1. Meconium looks different to other baby poo because it’s made up of things your baby’s ‘eaten’ in the womb (sometimes including lanugo, the fine hair that covered them earlier in pregnancy)3.

You should notice your little one’s poo change colour when they start to grow and feed. If you’re breastfeeding, you can expect your baby’s poos to become a pale yellow colour after a few days. Formula-fed babies tend to have darker and sometimes even green poos2.  If you switch from exclusively breastfeeding to combi-feeding or to formula feeding, you might notice that your baby’s poo becomes darker and firmer4.

You can see examples of different baby poo colours for yourself in our baby poo colour chart.

The colour (and smell) of your baby’s poo will change again when they start to eat solid foods (seriously, buckle up), but that won’t be until they’re about 6 months old5.

Let's talk poo texture

Meconium, your baby’s first poo, tends to have a sticky, tar-like texture1. Be warned, meconium can be very stubborn to get off baby clothes – and your little one!

After a couple of days, the texture of your baby’s poo will change and be quite soft for breastfed babies, and a little firmer if you’re using formula or if you’ve switched to combi-feeding4. You might also notice what looks like little seeds in your baby’s poo – this is also completely normal2.

How often should a newborn poo?

There’s no hard and fast rule about this – every baby’s different. In general, your newborn will probably poo a lot in the early weeks and then less as they grow. Your little one might have a poo after every feed at first and then just once a day after the first few weeks1“I couldn’t quite believe how many nappies my baby went through, even in those early days. Put nappies, lots of nappies, on your list of things to pack in your hospital bag. If you don’t use them on the maternity ward, you’ll certainly need them when you get home!” (Isla’s mum).

Your baby might sometimes go a few days without pooing, especially if they’re breastfeeding. But as long as their poos are still soft, this doesn’t mean they’re constipated1.

What’s that smell?!

You can’t avoid the facts… baby poo smells. But it doesn’t all smell the same.

Formula-fed baby’s poo tends to smell more strongly than breastfed baby’s poo. So, if you switch from breastfeeding to formula feeding, or your baby is ready to wean, prepare yourself for some potentially pungent nappy changes!2

Is my baby constipated?

Believe it or not, it’s common for some babies to strain or cry when they’re having a poo or go a few days without pooing at all (especially if you’re breastfeeding). But as long as the poo they do produce is nice and soft, it’s unlikely that they’re constipated1.

Your baby could be constipated if6:

  • They have small, dry or hard poos
  • Their wind and poo is smellier than normal
  • They’re not as hungry
  • Their tummy feels firmer than normal

Breastfed babies don’t get constipated very often. This is because breast milk is a natural laxative, and so breastfeeding babies may well poo a few times a day in the first six weeks of life7.

Constipation is a little more common for babies who are formula-fed or who are weaning, as their digestive system is getting used ti digesting and coping with new things2, 7.

If you think your baby’s constipated, you can try to get things moving again at home by6:

  • Lying them down and gently moving their legs like they’re riding a bike
  • Giving them a little tummy massage

If your little one still seems constipated after a few days, your GP or health visitor can give you some more advice.

What does baby diarrhoea look like?

Because baby poo tends to be pretty soft and paste-like before they start to eat solid foods, you might be worried that they have diarrhoea. But most of the time, that’s just what poos on an all-milk diet look like!

You’ll get to know what’s normal for your little one, and it’ll be fairly obvious if their baby poo changes.

Your baby might have diarrhoea if8:

  • Their poos are a lot more watery than usual
  • Their poos smell worse than is normal for them
  • They’re pooing more often

As long as your baby doesn’t seem dehydrated, you can normally manage your baby’s diarrhoea at home – but check in with your GP or health visitor if you’re not sure8.

Keep your baby happy in their nappy: when to seek advice about your baby’s poo?

When you’re changing your baby’s nappy more times than you care to count, you get to know their pooing habits. If their poo changes without you changing their diet (e.g. switching from breastfeeding to bottle feeding or weaning), it’s always a good idea to talk to your GP or health visitor to make sure everything’s okay.

Some things to watch out for include2:
 

  • Watery poos (could be a sign of diarrhoea)
  • Hard, small poos (could be a sign of constipation)
  • Pale poos
  • Poos that are smellier than normal
  • Poos that have blood in them

Top tip 💡

If you want to, you could always keep a diary of your baby’s feeding and toilet habits to make it easier to spot changes in their appetite or poos.

You might find this most useful when your little one starts to eat solid foods, to see if anything in particular upsets their tummy.

It might sound strange, but the sight of your baby’s first poo will be something you welcome! It’s called meconium, and will be dark, greenish black in colour, but this will change as your baby grows. Over the next few days it will start to turn brown, orange or yellow, depending on whether your baby is breast or formula fed.

Breastfed baby poo tends to be yellow, whereas formula fed baby poo can be yellow-green or a pale brown. Once your baby starts eating solid food, their poo is likely to turn into a darker colour.

Green baby poo might look strange, but it’s usually nothing to worry about. Some formula milks designed to help with digestion problems can cause green baby poo, but if it persists, talk to your midwife or GP to rule out any underlying issues.

You should always speak to a healthcare professional if your baby’s poo is black (after the first poo), red, grey or white, as these could indicate a health problem that needs to be treated. 

Take a look at our baby poo colour chart to get a better idea of what to look out for.
 

Did you know?

Some babies have their first poo during or straight after birth!4 If your baby hasn’t had a poo within 24 hours of their arrival, check in with your GP or midwife who can take a look at your baby and make sure that everything’s OK.

When your baby does a poo for the first time, it will have a sticky, tar-like consistency. Be warned, this can be very stubborn to remove from baby clothes, not to mention your actual baby!

As your tiny tot grows, the consistency of their poo will change. Breastfed baby poo can be quite runny, and might have what looks like seeds in it - this is completely normal. Formula fed baby poo on the other hand, is likely to be firmer or more paste-like.

Baby poo when weaning. Change is ahead!


Once your baby starts to enjoy their first tastes of solid food, their poo may become more solid in texture.

If you’ve noticed a change to your baby’s pooing habits, and you’ve recently switched from breast to formula feeding, then chances are your baby’s poo will be different in terms of texture, smell and appearance.  This is completely normal.

So just how often should your baby poo?

Some babies poo at every feed and other babies poo once a day.  Some babies may poo every day, others may only poo every few days.  You’ll soon notice a pattern for your baby.

The important thing to remember here is that all babies are different.  So what’s normal for one baby may not be the same for yours. Ultimately, if your baby is gaining weight, not in distress and feeding well, there’s usually no cause for concern. Another consideration is their diet, as the frequency of baby poo when weaning might be different to how often breast and formula fed babies do a poo. 

There’s no getting away from it, your baby’s going to create a stink! Particularly if they’re formula fed, as this tends to result in stronger smelling poos.  Breastfed baby poo doesn’t really have a strong aroma, beyond smelling a little sweet. 

Once your baby embarks on their weaning journey, the variety of foods will change the way their poo smells (spoiler alert: it’s more than likely going to be much stronger!).

If you notice that your baby is producing consistently foul smelling poos, it’s always best to have a chat with your GP or public health nurse to check that everything’s OK and put your mind at ease. 

The bottom line

Baby poo is just one of those things you get used to dealing with when you’re busy being a parent. But whether it’s understanding your baby’s first poo, or guiding them through the potty training process, remember that you know your baby better than anyone. Just take things one day at a time and follow your baby’s lead.

If you’ve got any questions or want to talk about what to expect when it comes to all things baby poo, our team of baby experts is available to offer reassurance and advice. We’re here whenever you need us, so just give us a call.

 

Last reviewed: February 2025
Reviewed by Nutricia’s Medical and Scientific Affairs Team

 
  1. NHS (2024). How to change your baby's nappy [online] Available at https://www.nhs.uk/conditions/baby/caring-for-a-newborn/how-to-change-your-babys-nappy/ [Accessed January 2025]
  2. NCT (2024). Newborn baby poo in nappies [online] Available at https://www.nct.org.uk/information/baby-toddler/caring-for-your-baby-or-toddler/newborn-baby-poo-nappies [Accessed January 2025]
  3. NHS 111 Wales (2023). Your baby at 37 weeks [online] Available at https://111.wales.nhs.uk/livewell/pregnancy/37to40weeks/ [Accessed January 2025]
  4. NHS Cambridgeshire Community Services. Understanding your baby's poo [online 2023]. Available at https://www.cambspborochildrenshealth.nhs.uk/peeing-pooing-and-toileting/understanding-your-babys-poo/. [Accessed February 2025]
  5. NHS Start for Life. How to start weaning your baby [online] Available at https://www.nhs.uk/start-for-life/baby/weaning/how-to-start-weaning-your-baby/ [Accessed January 2025]
  6. NHS Start for Life. Constipation and bottle feeding [online] Available at https://www.nhs.uk/start-for-life/baby/feeding-your-baby/bottle-feeding/bottle-feeding-challenges/constipation-and-bottle-feeding/ [Accessed January 2025]
  7. NHS Start for Life. Constipation and breastfeeding [online]. Available at https://www.nhs.uk/start-for-life/baby/feeding-your-baby/breastfeeding/breastfeeding-challenges/constipation/. [Accessed February 2025]
  8. NHS West Suffolk (2022) Gastroenteritis - management of babies and children [online] Available at https://www.wsh.nhs.uk/CMS-Documents/Patient-leaflets/PaediatricDepartment/6223-1-Gastroenteritis-management-of-babies-and-children.pdf [Accessed January 2025]
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