My new born is 8days old, he is popping yellow liquid poop from last two days after feed all time.. I do breast feed and formula both. Its it a concern?

A. Runny stools can even be bordered by a water ring. These are all normal stools. Breastfed babies often pass more than 6 stools per day. Until 2 months of age, they may pass a stool after each feeding.