Hi mama! Ang dami ng poop ng baby ay normal talaga, lalo na kung exclusive breastfeeding pa lang siya, some of my mum friends' babies poop 6-8 times a day, especially in the first few months, so that's usually fine. Yung kulay na yellow to dark green with that sour smell ay pretty normal din for breastfed babies, pero if you're worried or kung parang may diarrhea na siya (watery talaga, or mas marami pa ang bili), best to check with your pedia just to be sure, kasi mas alam nila ang pattern ng baby mo at ma-aassure ka na!