WoofyGator Great user name, and one of the few predators we don't have in this neck of the woods!
And if you think DE is great for chickens (and it is!), you should see all the benefits for people, as I've been finding out...
PM me so I don't hijack this thread (no, I don't sell it!)
I use DE too, and can't say enough about it. You could also put a scoop of it on their bedding (I use wood shavings) and see if they use that area to dust bathe, which also helps. Or, depending on where you live, you could also provide a spot for dust bathing in their run or in your yard, if you...