Like others said, it could be related to temp or the fact that breastmilk is sweeter than cows milk, etc. But there could be a biological reason for her aversion to milk such as an allergy or intolerance. I was lactose intollerant for the longest time, but somehow when I got prego w/#1, it cured itself... Anyway, I would have no problem eating dairy products, but couldn't drink straight milk. I still don't like the taste of plain white milk, but I can drink it without getting sick now.
A naturopath would be able to test for an intolerance or allergy without the invasive procedures an allergist would use. I've been to both.. the allergist put me through hell and only made me feel worse, but the naturopath actually has cured many allergies I've had my whole life. I'm now actually studying naturopathy myself due to the life-changing experience I've had with it. =o)