We have started switching E's bottles to 1/4 soy milk, 3/4 formula and have been doing this for about 5 days now. Starting on Saturday morning, she has had diarrhea and it's continued. Is this a side effect of introducing soy milk? I have heard of kids becoming constipated during the transition but not the opposite. Her little bottom is so sore it breaks my heart, I don't know if I should pull the milk and try something else or let it run its course for another day or two? Any help or insight would be great!