I have been told by many many people that if your infant is having trouble with hard stool and you are using tap water then that may be the cause of the constipation. It makes sense to me because they have jugs of purified water for babies. Also my daughter would get constipated only when i would run out of the baby water and use tap water. Wic would also ask what kind of water i was using.why would they ask that if it isn't a good idea to give your baby tap water?View Thread