Ay mama, parang may mucus yun sa poop, normal lang talaga yan especially if baby's still adjusting sa feeding, pero if it's happening consistently or may fever pa siya, better check with the pedia to be sure, kasi sometimes it can be a sign ng mild tummy upset or allergy sa formula/food. One of my mum friends' baby had the same thing and it turned out okay lang, pero really better to have the doctor check para ma-peace of mind ka!