Well you were misinformed
http://www.dirtdoctor.com/Diatomaceous-Earth_vq21.htm
"DE will not hurt earthworms "
Another reference from worm farmers
http://www.wormfarmingrevealed.com/d...ous-earth.html
FYI the DE in absorbant is not effective against bugs, best to use food grade. It's too big! Food grade is like a powder. The stuff for pools is dangerous as it is processed, filter grade. Avoid that, do not use!!
I think it has high silica, which is what is dangerous to breath. I'm pretty sure the absorbant is considered safe to ingest, no treatment would be given. It may very well be food grade? Not sure?