My one year old has been on milk-based formula since I stopped breastfeeding 4 months ago. The ped said to continue formula until 15 months which is in July. I switch him to soy toddler formula, but he has had diarrhea the past 2 days from it. I think I'm just going to stop formula all together, but I still worry about his weight gain. He is in the 4th percentile for weight. Suggestions please? -Beginner vegan as of a month ago!