Is it ok to spread Diatomaceous earth regularly on the coop floor and where the chickens take dust baths to control mites? A few of my hens scales on their feet started to raise up. Read a little about it and found that it was most likely mites. Sprayed mineral oil on their feet for a week to choke them out. I was at tractor supply and the guy there told me to spread diatomaceous earth on the coop floor and run weekly to control mites. He said it wont hurt the chickens. Anyone do this?