Actually it was answered several times.....it is safe.
These grounds are 'spent', already used to make coffee to drink, so the caffeine is gone.
Please post a link to this article?
Drinking brewed coffee or tea is not the same as nibbling a few spent grounds.
Well, it's marketed at chickens, and OMRI, so of course it's stupid expensive.
Plus it's not near as good as granulated zeolite.
https://www.absorbentproductsltd.com/fresh-coop-odor-control/
" Food Chemical Codex Grade Diatomaceous Earth with Calcium Montmorillonite and non-GMO Citric Acid to...