I have a 4 year old hen that had mites. Both of my chickens were treated with sevin dust, also coop was completely cleaned and treated with sevin dust twice now. However one of the chickens has very small white mites crawling all over her eye which is swollen, remained shut and has drained some pus. We are cleaning the eye daily and applying antibiotic eye ointment. Started applying permethrin dust to the back of her neck today. What else can I do to treat this? And yes I know well how to clean out a dirty wound including an eye. We even are applying warm compresses daily. She seems to appreciate the treatment.