BetterFeeling, don't allergy care centers here in tlhe US also test food allergies? They always say that on the commercials...
Ducky, I had a rotten egg taste in my mouth when I belch, too. But I am not lactose intolerant so for me, I don't think it was from the milk.
Can you have your daughter checked for celiac? I think that is also a good idea! It is a simple blood test. I got tested for that too.