WDW has everything!! My daughter is allergic to dairy, and on our last trip she was extremely catered to. We did call ahead for our sitdown meals, but even counter service restaurants were prepared. At MK, the Main St. Ice Cream shop even has 3 flavors of Rice Dream Ice Cream available (You need to ask) All restaurants will prepare food special for you, if you ask. (ie. mashed potatoes without milk and butter, pizza without cheese)