I have seen that a lot of people have boxes with play sand in it for the chickens to dust bathe. Can you put Seven or Dia. Earth in these boxes to help with mites and lice? Or should you do it differently? I have done a search and a lot of people add wood ashes also, will the rain wash away the wood ashes, seven, or DE? What kind of ratio should I mix to the sand? Or does it matter? Ok now I see someone else has asked this same question under a different subject. How do I move this post? or Delete?