I agree with what play and learn said about letting the provider/s know before the interview as I had a family come for an interview once and they only told me then that their daughter is severely allergic to nuts. I can't accept children with that type of allergy as I can't assure a nut-free environment, so I wish they had mentioned it before and saved us all a lot of time. I would discuss it first and ask the provider how/if they can accomodate such an allergy. You may need to pack your daughter's food yourself to be sure there are no milk products in anything she eats. That is something you could offer to a provider as well.