hi M.
i agree w the moms who suggested rice milk, it's pretty inoffensive to almost any body's body. but also, this thought; does she really need to be drinking milk?
in other words, is it only straight milk that bothers her and she is able to eat other dairy like yogurt and some cheese? my kids, who are 3 yr and 19 mos, do not drink milk and never have. they eat yogurt and cheese and that's plenty of dairy, probably more than enough. both my kids are very big, very verbal, and very energetic; in other words they are not missing any nutrition for not drinking milk. they get a lot of protien and calcium from many other foods. i make them high protien noodles with cheese probably 4 times a week, just using a little american cheese and tofu cream cheese and 2% milk and margarine, throw some peas in there, they love it. they get chocolate milk once in a while for a treat. to drink, they get water almost exclusively. they don't drink juice because most juices are barely more than sugar except the very expensive ones which i am not about to blow half the grocery budget on, and they eat a lot of fruit; at least an apple and a banana and strawberries almost every day.
so i would suggest if your daughter is eating a good variety of other foods with vitamins and especially if she enjoys yogurt, skip the milk altogether, even rice milk doesn't have much nutritional value, anyway.
milk has a lot of good stuff in it to be sure, but probably too much of everything and certainly many too many hormones, and it is a food really meant for animals that are supposed to gain 400 lbs in the first year of life. (in fact i am suspicious that excessive milk drinking is the cause of girls going through puberty so much earlier in recent years which leads to the rising rate of teen age pregnancy; call me paranoid.) so especially if your daughter was breastfed (and if she still is, even better), she really doesn't need this if she eats other good foods.
good luck
J.