Help!! My son had his 15 month check up last friday. I knew from the get go that the doctor was going to tell me hes underweight. He is, i already knew that. But he actually lost a pound since may. The doctor asked me if he drinks whole milk. I said no, he wont drink milk of any kind besides breastmilk. Ive tried every single kind of milk out there. Whole milk, almond milk, hemp milk, vanilla almond milk etc. The dr said he needs the milk for the calories so he suggested something that i just do...