Please, dont let them stop you from enjoying WDW or a very good meal
Natalia has a diary allergy, and I just made sure I marked it when making online ADRs
At each restaurant the server asked what the allergy was for and not 3 minutes later the chef would come out and either explain what she couldnt eat from the buffet or offer to cook something especially for her She was even able to eat diary free Mickey waffles
WE had a WONDERFUL experience, and felt totally taken care of. She was able to enjoy every single meal and eat quality food, and we knew for certain that she wasnt getting any diary at all!