Last year, I had trouble with Mites of some sort. Itchy when i even entered the run. Should I use Diatomaceous Earth this year? Put some food grade DE in a dust bath for them? What else should i put in the Dust bath? Ratios? Should I worm my chickens? Can I do it? how often? Eat eggs while I'm using DE? Eat eggs no earlier than 7 days after worming? Did my mites come from a rainy summer and a wet, muddy run? Thanks - Total NEW EGG!