Blue Milk?

My daughter Evelyn is a very picky eater and it shows. At 2 and a half years she weighs in at 22 pounds with a wet diaper. She rarely will eat meat, wont drink milk or even water. I have had to trick her into eating everything except for the 3 or 4 things that she likes. In the morning i make her smoothies and sneak in soy protein powder and ground flax. Andy was clever enough to tell her that water was "cloud juice" and now she loves it. I have been trying to get her to drink more milk to help her gain weight but she just refuses to touch it. Tonight Andy suggested we put food color in milk to see if she will drink it. I put a drop of blue dye in a cup of milk and told her it was blue juice. She downed it and asked for more blue milk. I laughed that even though she could tell that it was milk she wanted more just because it was blue. What a stinker!