Short answer...you are wrong.....DE does not kill internal parasites .
There are 24 pages here of DE discussion that will explain the whys and why nots...start reading
Either adding to an existing thread (after reading the whole thread and not finding an answer)....
.....or starting a new thread will work.
-Possibly, Yes...breathing it is not good at all, and it won't do any good things for your deep litter either.
-Don't waste your money, DE does nothing...
Ditto Dat^^^
That's for sure......
Except I do keep some on hand in case I get grain mites in a bag of feed, I found it does work very well for that after getting several infested bags last year.
I also put some under nest bedding and in other cracks and crevices in the coop where it can't...
It's good to use in feed and the cans feed is stored in, especially if you've found any grain mites, and under straw/bedding in nests as a preventative.