It is certainly not too late to have a medical food issue noted on your dining reservations -- and this is something that you certainly should do. From Disney's perspective, it doesn't really matter whether you or your travel agent is the one that calls Disney Dining. However, if it were me personally with a health issue, I'd probably prefer to make the call myself, just to make sure that the information gets conveyed properly.
I would also take a two-pronged approach to communicating your needs to WDW:
- Whenever making any reservation at a
table service meal, make sure to tell your reservationist about any food restrictions in your party (and then remind your server upon arrival).
Almost always a chef will come out to speak with you about your needs
to ensure that they are preparing your food properly. Meal reservations
and special requests can be made by calling 407-WDW-DINE.
- Also, there is
an entire department at Disney Dining dedicated to helping guests with
food allergies, food intolerances, other medical issues, and
religious-based food requirements. Just send an email describing
your situation (at least 14 days in advance of your trip) to
SpecialDiets@DisneyWorld.com.
A cast member will get back to you with the information you need to
make sure that your family has a safe, and delicious, visit to WDW.
A great resource for you is a book called PassPorter's Open Mouse for
WaltDisney World and the Disney Cruise Line. This sells for
approximately $20 and is available through amazon.com and many larger
bookstores. Open Mouse gives incredibly detailed information for Disney
guests with any sort of challenge, from anxiety to allergies and
everything in between.
Good luck and have a great trip to WDW!