Ok ladies what have you guys done to help with constipation in babies? My baby is 3 weeks old and she only poops once every 3 days and she's miserable, she's fussy and won't eat or sleep very much, you can tell she's straining. The doctor has had me try sugar water, suppositories, and he switched her formula from Similac advanced to Gerber good start gentle. She's been on the gentle for less then 24 hours now.