My second baby had strings of mucous in her stool for 10 days from one dose of baby vitamins with fluoride. She was otherwise exclusively breastfed. I didn't really believe it so I gave her another dose after about 2 weeks and the same thing happened again. Check carefully with the mother about anything and everything that goes into the baby's mouth. After weaning (at 4 1/2) she developed allergies and to this day we can't pin them down. I just spoke to her the other day (she is now 20 and in college) and she wishes that her allergies didn't get worse every time she comes home. I wonder if it would have been different if I had followed an elimination/rotation diet while pregnant and nursing. Isn't hindsight wonderful. Sarah Friend Barnett, LLLL, IBCLC Bronx (New York City), New York [log in to unmask]