Baby was mixed fed since and had S26 since newborn. He was able to take it well so didnt change to other brands. If i suspect constipation, i will just massage his tummy clockwise direction and move his legs in a cycling motion. So far no major issues.
My baby's bowel movement improved after taking illuma stage 1. She is now pooping once a day or every other day. Previously she is on Nan Optipro 1, she had days whereby she poops only after 5 days. By the way, she is on mixed feeding.
Because is pre-mature baby, probably you want call back pd to check whether which formula to change