Because it doesn't kill bugs and is a serious respiratory irritant.
DE is a 'hot topic'.
Some believe it is miraculous.
Some believe it is pretty much worthless.
Post a pic of what you have/had?
He makes some decent points...
....but plain sandy/dirt is fine, DE should not be used, IMO.
Ash should be from hardwood burning.
Sweet props!!
I used to do this, but they never used the bin...so I stopped after a few years. Under the coop part of the run stays dry enough(to not freeze) to dust bathe all winter.