Our paediatrician told us to switch from Similac Advance Stage 1 to NAN PRO Excella Stage 1 due to constipation issues in my baby. Her poop looks like hard pellets and she strains a bit while pooping. She is formula-fed because of lactation issues. The baby is 29 days old and weighs 4.2 kg (she weighed 3.6 kg three weeks ago). She takes 60 ml of formula every 2 to 3 hours, with a total of 9 to 10 feeds a day. I am giving her a multivitamin (0.5 ml) and vitamin D (400 IU, 1 ml) daily. The paediatrician gave us Ferrobax Kidz and Ca++ Bytes drops. I assume formula is already fortified, I am using multivitamin and she is a full term baby born on 40th week. Does she also need iron and calcium drops? Please note we are in remote town and can’t question the doctor.