Parents that are anti-dye and other additives in food. What do you do if your child is invited to a birthday party, send them with their own snacks or?

Our neighbor’s daughter has a lot of food allergies: nuts, melon, eggs. So when we had a birthday party they brought her her own cupcake.

As a mom, I also wouldn’t be against someone asking about the food that will be provided at the party? Pizza? Cool. Some fruit available? Cool.