Hi Anna,
In Canada, the recommendation for 1-5yo is 500mL or 2 cups of cow's milk or equivalent (cheese, yoghurt, etc) It really isn't necessary for children to drink cow's milk if there is a problem (or dislike for it) as long as their overall diet is balanced and is getting the calcium from other sources (veggies or fortified juices). There was a time when cow's milk was really bad for dd's eczema (2yo or something) and her ped recommended that we offer her soy-based drinks.
HTH