A lot of people will recommend yogurt as possibly ok, even with a milk allergy. My understanding for the reason why is because the culturing process partially digests the milk protein casein, and make it easier to absorb/digest. (think about hypo allergenic formulas - some have soy, or milk in it, but the proteins are broken down so much that an MSPI baby can tolerate it - however, not saying that yogurt is broken down that much, I honestly don't know). So in theory it's true that yogurt at some level may be tolerated. Right now I have just started offering some to my DD2 (who just turned 2). It's pretty much the last step for us before an actual glass of milk.
That being said, there is no way I would touch it for several months after eliminating it from my diet in order to BF my MPI child (and I didn't have yogurt at all during the 16 months I was on an ED). That was because she reacted to everything - just the tiniest amount of hidden dairy in a product that I ate would impact her. So I didn't touch anything until we started challenging later on.
It's a bit irresponsible to just say "yogurt will be fine", but if I understand correctly she was probably referring to it being less of a digestive issue and possibly safe because of the culturing process.
Hope this helps some!
