my dd2 is MSPI, so I've been dairy/soy free since April. In August, we tried goat cheese and she did just fine
It was just before she turned 6 mos - I wanted to try cheese for me before trying solids for her. I had wanted to try earlier (when she was 4 mos), but my pediatrician advised us to wait a bit longer, as we had just gotten her stabilized on reflux meds and the dairy/soy free diet (when she was 3 mos). So we waited a couple more months and she was fine with it. I've not tried cow's milk/cheese yet, and I'm not planning to until after she's a year. But goat cheese has been fine so far. I was told that the protein is easier than the cow's milk protein, and that has proved true for us at least.