Hi Lisa,
Wow, 29 days! Are you "too excited to sleep" yet?
I'm sorry to hear your princess learned of a new allergy, but rest assured Walt Disney World Resort will take very good care of her. Not only are you able to select Special Dietary Needs from the online reservation system, but you can also contact Disney directly. I've personally added my allergy to my reservations upon booking, and additionally emailed specialdiets@disneyworld.com to ensure the allergy was noted.
Soy Milk will be available at most markets within Disney Resort hotels, as well.
I found it especially fun to utilize the touchscreen terminals at
Be Our Guest Restaurant, which allowed me to eliminate my allergen from the menu. Magically, my options became a perfect match for my needs.
The culinary staff at Walt Disney World will be happy to answer questions you have about the menus, so please do not hesitate to reach out to a Cast Member while traveling.
I hope you have a wonderful vacation, Lisa, and please visit us again soon!
Sherri