Well, we saw the allergist today. We did a skin prick test for milk, wheat, oat and peanut. He has previously tested positive to milk and wheat, had a possible eczema reaction to oat, and has strangely never been tested for peanut. He came up positive for milk, wheat, and oat, and negative for peanut (I am happy about that, but we will never feed it to him because of his other nut allergies). The allergist felt his wheat reaction was severe enough that a challenge would fail. He would like to retest in a year. So, that leaves him still allergic to: wheat, milk, egg, nuts, sesame, and possibly oat.
Despite the less than wonderful news, I left the appointment smiling. The little guy was just so delightfully charming and clever at his appointment, showing off his newly found geography and reading skills, that I couldn't help but feel like a lucky mom to a thriving boy. So, we will just keep doing what we're doing for now (like cooking these sweet potato muffins with orange ginger icing that we made today). Better luck next time.