I have re-discovered a natural, safe and full proof way of dealing with this serious problem, after losing my favourite rooster Little Red,to the brain infection caused by the mites entering the ear canals. Mash many cloves of garlic with any natural vegetable oil, olive or rice bran work best, then pass through a fine sieve, to make an oily garlicky lotion. Use this mixture and with your hands rub throughout feathers, wings,,tummy and especially around the head, neck and ears. Change all bedding, I also sprinkled diatomaceous earth underneath the new bedding. Within 3 days I had no mites anywhere, adding garlic powder every now and then to some wet food for them also stops mites and helps get rid of some intestinal parasites.