Sounds like another Explorer.  Slight possibility of Hunter.

The four foods you mentioned specifically are all "avoids" for O nonnies (non-secretors.) I suggest cutting out all foods that are "avoids" for O secretors or for O nonnies, until you're able to get his secretor status tested. I'd also put him on a completely gluten free diet (which basically means not feeding him rye, the one gluten-grain that's OK for O nonnies.) If there are more foods that are OK for O's but he's allergic to, then continue to avoid those foods as well.

If he only wants canned fruits and veggies, go ahead and buy him canned fruits and veggies by the case. I would make that a VERY low priority- first is getting beneficial foods into him, second is cutting out the avoids, third is making sure he gets enough veggies and protien. Way down the road, after he's done a lot of healing, work on the texture issues and try to get him to eat fresh produce.

I'm guessing from context that he's still a fairly young child. I'd stick with the BTD for him, and not worry about genotype diet or SWAMI until he's older. You probably won't need to worry about that until he's done growing, but you may consider it sooner (say, a year from now) if he's not healing enough from BTD alone. The only reason to put a child on GTD (GenoType diet) is if he's allergic to too many of the "beneficials" for his blood type.

Quoted from Victoria

Great fish recipe!  

Yes! It sounds yummy!

Also ditto'ing what Victoria said.  And would add that I've read somewhere that wheat/gluten and milk proteins can all contribute to neurological issues.
You sound like you have been doing a wonderful job at playing detective and helping your son.
Your instincts are good!
lin

Quoted from Brighid45

Lots of good information in the posts above, so I'll give you this addendum.  

You mentioned your fish sticks needed help--try this: cut a firm fish like cod or haddock in stick form. Have two bowls ready, one filled with white rice flour, the other with beaten egg. (You can add some sea salt to the flour if you like.) Roll the sticks in the rice flour first, then in the beaten egg, then in the rice flour again. Fry or bake them the way you normally do, using a compliant oil. The rice flour makes a nice light batter that's crispy. And it's okay for your type O too

Ummmmmmmmmmmm.  Good sugg, Brig!  Wouldn't hurt to put some Old Bay type (crab spice) seasoning in the rice flour, too, though I haven't read the ingredients of Old Bay, so you might wish to do that first and make your own from individual ingredients if there are any baddies in there.

Interesting that all the foods that you specifically mentioned are avoids for O's including milk, soy, oranges, peanut butter.  
You have a lot to deal with, I wish all of you the best.
Jane