Aww poor little guy, that's definitely a sad experience! I always tell myself that I'm young enough to see allergies cured in my lifetime, so fingers crossed for the both of us!
That's rough with the distance to grocery stores, yikes! Seems like homemade stuff from scratch may have to be his staple! PCC is an upscale-ish grocery store that sells all the organic, gluten-free, egg-free kind of stuff. Bit cheaper than Whole Foods, but still not the most wallet-friendly place you could shop. Sadly, most of the allergy-friendly stuff is expensive everywhere =/
Does Amazon Fresh deliver out to you guys? I've never used them, but it could be a good option! I'd also recommend Orgain's Organic Nutrition shakes, I had to go on a liquid-only diet for some surgery recently, and that stuff literally kept me alive! Super tasty too, I love the chocolate flavor! I get them from Amazon, they don't need refrigeration so I'll just buy as many as I can afford when they go on sale and then stuff them wherever I can. Here's a link: https://smile.amazon.com/gp/product/B00JTX7SH2/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
I found dealing with allergies at school a bit rough when I was younger, but it certainly gets easier! So long as he has something he's comfortable eating during parties and such that should make things better!
Orgain Organic Vegan Plant Based Nutritional Shake, Smooth Chocolate - Meal Replacement, 16g Protein, 22 Vitamins & Minerals, Dairy Free, Gluten Free, 11 Ounce, 12 Count (Packaging May Vary) https://www.amazon.com/dp/B00JTX7SH2/ref=cm_sw_r_cp_api_glt_i_Y4WFYV48N3DVCKPV7V3D?_encoding=UTF8&psc=1 I swear these shakes saved me. I use the dairy ones but I have heard the vegan ones are also good!
Here’s a link to them on amazon Orgain Organic Vegan Plant Based Nutritional Shake, Smooth Chocolate - Meal Replacement, 16g Protein, 22 Vitamins & Minerals, Dairy Free, Gluten Free, 11 Ounce, 12 Count (Packaging May Vary) https://smile.amazon.com/dp/B00JTX7SH2/ref=cm_sw_r_cp_api_glt_fabc_CQ10EZ3QSSZAEXE6NTAB?_encoding=UTF8&psc=1
Closest I have found with good ingredients and cheap and convienient. Not enough calories and lacking in 3 vitamins.
https://www.jimmyjoy.com if you can handle whey.
Orgain makes a non-dairy, non-soy shake. They can be hard to find in stores, but you can find them online. Also more expensive than something like Carnation or Ensure.