My DD doesn't have any allergies, but she has had goat's milk. TBH, she seems to prefer cow's milk, so we're sticking mostly with that, but we get some from neighbors once in a while. Just to be sure to verify the source so you know it's safe and pasteurized. I've actually never asked our ped about it, but I have a feeling most doc's concerns would be around the source since goat's milk is going to come from small farms that may not be well monitored or regulated.