Yeah, our daughter was born with a cow milk protein allergy. She got early introduction via breast milk and it just made her really sick, it was a tough first few months until we figure out the problem. My wife stopped eating dairy and our daughters symptoms were gone in less than two weeks. I hope we can find a cure but early introduction definitely wasn't it.
Same situation here. For us it went away with gradually introducing dairy to her and that was the protocol given to us by the doc here.
She hasn't developed an appetite for cows milk yet (prefers oat), but enjoys many other kinds of dairy now, like cheese, yoghurts etc. without any symptoms.