My milk dried up around 3 weeks ago and we used the last of our freezer stash this weekend so my lil man is now EFF. My mom keeps saying that now that his is on formula, I need to give him water. I have not read this anywhere, but from time to time I will see a post on here about giving infants water. So should I? He has not has any issue with pooping so far, but we are only a few days into the formula only part. Is the water supposed to help with constipation? FTM here (as if it is not obvious, lol).