food is a complete elimination thing but I guess there are so many factors as well as food to consider. If she cuts the main allergy things out of her diet like dairy, peanuts, and then gradually reintroduce.... maybe start with what touches your daughter's skin first so got to hyperallergenic washing powder, cut out soap and use QV wash... my sister has contact dermatitis and her trigger is perfumes so EVERYTHING has to be unperfumed eg toilet paper, washing powder, soap, make up etc. So she uses QV, I think her washing powder is "aware" or "safe" but there is one from woolies that she can use... sorry lots of thoughts and not much concrete for you...