DE won’t help in this case. With an allergy to storage mites, it doesn’t matter whether the mites are dead or alive, just like if you’re allergic to chicken.
You are best off ordering a food direct from the company, then when you get it divide it into containers and put it in the freezer. Grain free will have substantially less mites, but if it is made somewhere where they also make grain inclusive foods, it’s no kind of guarantee. Storage mites can crawl from pallet to pallet and they can be on the equipment. Look for brands that are in heavy plastic or foil bags. Don’t overlook treats, they are a huge source of storage mites.
