B.F.
I don't really have much experience with food allergies, but my husband can't easily digest cow's milk so I buy him goat's milk. It's much more easily digestible (closest to mother's milk you can get) and you absorb much more of the calcium. I give it to our daughters for this reason. Most grocery stores carry it (Ingles) but Whole foods or something similar will definitly have it. Good luck!
Becka