Does anyone have experience and/or advice about soy for babies under 1year, particularly yogurt? I've heard the usual conflicting things (e.g. that babies can't digest soy milk, that tofu is a great early finger food, that soy is dangerous due to phyto-estrogens, etc). At the same time, cow's milk comes with similar digestion issues, but yogurt is fine, easier to digest because it's fermented -- does this apply to soy products as well?
We've been feeding our baby girl yogurt from (unsweetened organic whole) goat's, cow's and sheep's milk since she was 8m, and have had no issues. It seems like a good (and easy no-cook) protein source with her solid meals, and she enjoys it (we were warned not to try legumes too early because it would cause gas or something, we found that true for hummus and tofu at 9m, no problem for lentils).
Now we're all sick for the first time since she started solids, and since we always go off dairy while sick to reduce mucus and the baby has a lot of it, she's off dairy now too. I've been replacing her yogurt with soy yogurt, which she loves, even plain, and is eating 150-200mg/day (and some tofu as well), much more than she usually has of yogurt, so I think it's replacing some of her milk. I'm wondering if it's ok or if it could cause diarrhea / loose stools. It's hard to isolate since the her whole diet is different for the last couple of days. However, she's drinking less since she got sick, probably because of the stuffy nose, and is maybe a little dehydrated too? I do offer her water, and mostly let her decide what and how much of everything to eat or drink.
I have not so far found a vegetarian-friendly pediatrician, so I haven't bothered asking ours much about nutrition, and I just bought The New Vegetarian Baby, but otherwise have followed my instincts. I would love any perspective on any of this, and please let me know if i'm posting in the wrong section -- thank you!