My sons both had the same reactions to anything dairy, especially milk.
Because I was told that there was nothing wrong with them, I would try to get
them more tolerant and sneak in a little milk in their oatmeal. A tablespoon
was enough to make them lose the whole breakfast. They never were tested and
have become a little less sensitive as they have grown. I was told by a
pediatric allergist that I approached that the process of elimination and the
determinations that I had made as their mom were pretty accurate. She said to
just continue what I was doing in limiting dairy.
Kim