I've had my 2 month daughter on Enfamil Reguline (stool softner) for about a month and now I'm trying to switch her off. I've tried to give her Enfamil Infant powder and it seems to make her constipated. So I want to try giving her either Ready-to-use or Concentrated but don't seem to know the difference and which will be lighter on her stomach. Comment and let me know what you think. Thanks.