“...make sure people know to buy _food grade_ DE...”
Yes, I buy it in 50 lb bags from the feed mill. It is Food Grade. The DE for swimming pool filters is NOT Food Grade and should never be used with animals or people.
We dust the cat beds etc to deal with fleas, and sometimes the cats. Works great.
In the barn it minimizes flies.
We should get paid for making public service announcements....;]