That should be okay. It's rare that someone would have a response to the lactoferrin, so not entirely impossible. Most milk allergies revolve around a deficiency of bacteria which produce the lactase enzyme to breakdown milk lactose. Casein from Holstein cows commonly used in commercial milk dairies is a type that can be hard for humans to digest. Pasteurization can alter the natural components found in raw milk to create allergic responses by the body. Most milk allergies are responses to casein and lactose, not lactoferrin