If it is the taste, suggest mixing chocolate or strawberry flavor in the
milk. Of the different milks,
goat milk would be the best choice
and the closest to regular milk, then Soymilk. Almond milk does not have many nutrients as the above, and coconut milk is very high in saturated fat. If she is not lactose intolerant, suggest increasing other sources of calcium which is cheese, yogurt, pudding, and ice cream.