This post reminds me of a mom I helped a few years ago. Her 2 month old all of a suudden stopped pooping as did her 3 year old. At her ped's suggestion she administered suppositories to the toddler and gave Kyro syrup in EBM to the baby. This was the only way either one would pass a bowel movement. We discussed diet, allergies, vitamins etc. The only change was in her drinking water. She had switched from spring water to reverse osmosis. Once she switched back evrything went back to normal. Reverse osmosis H2O has virtually all particulate matter removed including beneficial trace minerals. This seemed to disrupt some balance for this family. Hope this helps. Tracy Kirschner