Well we used damacious earth both inside and out on chickens and we had good luck with mites and lice. Pick out infected feathers if lice and overly affected mite marked feathers. Then use a 7 dust liquid drench have to use it very lightly since its not for animal use but has gotten rid of them in emergencies. Very dilute when you do it. But since its for plant use only i will not say to do it or not. But i have and used it for over 25 yrs on all my poultry.