Question on 1st Birthday Cake - Allergies?

BabesBride

I'm making the desserts for LO's birthday party. I'm using boxed mixes for the most part for cake, cupcakes, and cake balls. However, for LO's smash cake, I'm a bit nervous b/c she has milk allergies, and possibly eggs too...She is being tested for all allergies after her birthday at the doctor, so I'm trying to think how to use the cake mix but not use eggs? Any tips you have would be greatly appreciated. Thank you!