Whew.. had to look up the spelling again on that one. I've read a few places that DE can be spread in the coop floor/shavings to help keep mites at bay. I've also read that DE is a very toxic substance and to wear gloves & mask whilst applying. The ladies are 3 yrs old.. never had any problems, so I'm not in a rush to don the protective gear. Just wondering what others have to say about using DE? Thanks!