Hi Emilia,
Gosh, it sure sounds like the soy, doesn't it... My kiddo had a soy intolerance, and his GI doctor told us that 90% of babies outgrow a milk or soy allergy by 1 yr, and 95% by 2 yrs (not sure if that is correct though...). So there is hope! :wink:
Is he a calm baby, or is he a bit grumpy? Since there is soy in many foods out there, sometimes even a small amount of soy can cause upset tummy without the rash... If he is grumpy, then maybe a trial elimination of all soy might help?
Le me know how it goes!