Constipation is a commom problem if the baby is on supplement food and not on mother's milk. External foods like Lactogen, Nusobee etc can lead to gassiness and constipation causig extreme incovinience to kids. My granny's advice is to give 3 balck currants boiled in water with little saunf. Drain this water and feed this water to the baby. You might want to check with your Doctor however as Doctors advice against giving commercial gripe water these days.