Last year, one of our hens had mites.( We think) After a bit of research, I settled on the organic remedy of adding garlic powder to their food, and cloves of garlic in their water. I am not sure whether it helped or they just got them off themselves or maybe it was just a really tough molt. It was not the right season though. But now as a preventative add apple cider vinegar to our hens' water, not much though. Hope you respond, ChickenGirl300.