I sure hope they do the test too!
I don't think I need to bring anything other than the Squash though. Every time I'm about to try him on a new fruit/veg something else happens, like he gets a nasty cold that lasts almost 2 weeks, or I decide to give him toothpaste on the same day as something else and I can't tell what's going on. Or I'm about to start a new veg when we just come back from someones house who I forgot has cats and then he breaks out again! OR I start on the Alimentum for 3 weeks which brings back all of his symptoms and I want to wait until he's completely clear before trying something else...
I've only ever tried sweet potato, squash, peas, beans, pear, and apple. Sure sounds like lots, but he gags on the peas and beans (purees) as they are more chunky and he vomits it all out with the first bite. Pear he likes and has no problems with. Apple he refuses to open his mouth after one bite! He is so picky. He loves his sweet potato though lol.
Plus when I spoke to my pediatric dietitian a few months ago she told me to avoid strawberries, blueberries, raspberries, and any fruit that has citrus in it. So I never tried many of the other fruit out there.
He doesn't take any antihistamines either. I was advised by my doctor months ago to give him Benadryl, but it caused him sever diarrhea! So does Advil... so yeah, nothing.