Oo normal lang yan, mama! Ang formula milk talaga mas malalim ang kulay at mas frequent ang poop compared sa purely breastfed babies, a few of my mum friends noticed the same thing with their LOs kaya hindi ka nag-iisa. Just make sure it's not too watery or may mucus, kasi yun na ang sign na something's off, pero kung solid-ish lang at consistent ang color, you're good!