Here's what I did and it worked for me I haven't had mites in a year,first I cleaned the coop sprayed a mix of pure orange oil and water in the nest boxes and on the Roost's then sprayed the chickens and roosters with permethrin under wings on neck,legs and vent area. Then what I did and do daily is mix cayenne pepper in with there food and snack's which has raisins in it so the pepper sticks too them,and I also use ACV in there water with the mother in it every time I put new water in the coop. I have over 40 chickens and sell and eat the eggs so I will not put any chemical's in them and cannot dip them in anything toxic,I had a pretty bad infestation last winter and actually had a worm problem also and it took care of both. It did take a couple weeks but haven't had a problem or lost a bird,I also breed and hatched 100's of chicks and start giving them the pepper at 8weeks so far so good.