Breastfeeding and baby poop


Hey ladies I have a question , so my little one is 2 months old exclusively breast fed twice already his poop has been a darkish green I read maybe it was because I let my breast get to full so I’ve been on top of pumping and using my Hakka and everything seemed fine this was about 2 weeks ago today again it happened he’s not sick I haven’t eaten any new or different and I’ve been making sure my breast aren’t over filled I’m not taking any medicine nor is he any idea why it’s turned color from it’s regular mustard color