We test milk with our daughter ever couple months or so to see if her reaction to it is gone. Today we hoped that maybe since she is almost 2 that it will have subsided.
Please follow the advice of your doctor before you do any allergy testing at home. Our daughter's reaction is just hives around the mouth and we know what to expect. Some allergic reactions can cause a child to stop breathing. You don't want to be that situation if you can avoid it.