A.F.
Someone recommended coconut milk -- but beware since he has peanut allergies too -- there is some correlation between the two (my daughter is milk, egg, peaut and fish allergic, diagnosed at 12 mos). Unfortunately because your kiddo is soy allergic too, a lot of the things we use wouldn't work for him -- but my daughter has been on Rice Milk since 12 mos old and I will tell you, she is not underweight or malnourished (though she is petite, due to genetics) -- I give her healthy whole foods and she gets her fats from avocados and olive oil mostly. We buy Rice Dream Organic Original Flavor by the CASE at Costco -- it is cheaper than the grocery store. Best wishes to you mama -- I know how hard it is and with soy and wheat too, it will be even harder :(