Towards the end of the week, breastfed babies typically pass mustard-yellow, seedy stools, while formula-fed babies pass firmer, yellow-brown stools. As the baby's digestive system matures ...

Dr Naheed Ali explains that poo will become mustard yellow in colour and have a seedy, mushy texture. The smell is usually mild, and it’s normal for breastfed babies to poop after every feed.