I have just read that wood ash can work as a natural way to get rid of mites/lice by adding it to the hens dust bath. Does anyone know if this is true? My hen and her baby chicks were badly infested. I put olive oil on the chicks and dusted the hen in Poultry Dust (active ingredient Maldison). I moved them to a new henhouse on the other side of the garden (and am in the process of scrubbing out the old house with Malawash). I've sprayed the new house with tea tree oil and put DE and wood ash on the floors. My hen has pecked her feathers out in patches and I've just noticed that the chicks have got blood at the base of their feathers too (obviously from pecking at the mites). The chicks are only 4 weeks old. I just don't know what else to do????