Krex, I have the exact opposite problem for my 3.5YO. Kate drinks waaaay too much milk. She's toilet trained now, but still needs her diapers at night.. and she's drinking so much that her Pampers cannot hold anymore. We've been telling her that she's so big now and shouldn't drink so much, but she's got a real addiction.
BTW, she has been drinking fresh milk for a while, and it can be a real chore to warm up the milk (esp when she goes cold turkey), so usually, I just add abit of hot water into the milk and that makes the milk pretty warm too. To be honest, I actually prefer for her to drink cold milk, since all you get from outside is cold milk.. that's why I say we have the exact opposite problem. LOL!
But I think boys tend not to like milk, and this is a sweep statement, but my boy doesn't drink much milk too. My Godson too.