thats kind of difficult...i doubt there is any such foundation that will never break anyone out. I've even heard of breakouts with mineral foundations. I think you should just use your covergirl foundations for now, I havent really heard of people being allergic to them. If you want you can do a little test patch on their wrist to see if they have an allergy to the ingredients. And it is not very likely that one would have a horrible breakout from using a foundation once.