My son’s allergic to cow milk and soy, so he gets calcium from spinach and calcium-fortified OJ, which he loves. At 6, he’s as rambunctious and filled with daredevilry as other kids his age and hasn’t broken a bone yet - whereas his friends have.
Point being, responsible parents know what’s best for their kids, take precautions and make adjustments to their kids diets as necessary; and DON’T need the state telling them how to do it!
Is he allergic to other kinds of milk? Goat? Sheep?