I wrote to the bakery , told them our story, noted that they are not required to list any sesame allergen warnings, and asked them to consider adding a sesame warning on their labels in the future.
I got the nicest note back written by the gentleman who originally spoke with me about the safety of their pita bread. He expressed such genuine concern for DD and really took to heart what I asked. He is going to bring it to the attention of the bakery owners, etc... for consideration. I couldn't have asked for more. What a great response.
DD continues to do very well! She was quite impressed with the note I received.