As a kid, the only type of dairy that I consumed was rice milk and rice products... my little brother is/was deathly allergic to cows milk, as well as any soy products. I never had cows milk until college, yet I have had stomach issues my whole life. Surprisingly though I can tolerate cows milk fine, and drink it by the gallons. When I first started having some stomach issues my doc thought it was a lactose/haltose/fructose intolerancy, yet even with removing the milk and those products from my diet, I still had problems and well Crohns undiagnosed at the time.