Some people switch to goat’s milk because of perceived sensitivities to cow’s milk. If a person has an allergic sensitivity, it is usually due to one or more of the proteins in milk. The proteins in goat’s milk are closely related to those in cow’s milk, so replacing one type of milk with the other usually doesn’t make any difference. Milk allergies are more common in very young children and most tend to grow out of them or build up a tolerance to milk