Chickens Dusting

I have to be careful walking around the farm as the chickens like to dig holes to dust in. The holes will be a good six to eight inches deep. The birds spread their wings out, roll around in the hole & throw dust over themselves to annoy the parasites that try to live on them. By bathing in very fine dust, the chickens are able to cut down on the "bug" population since the dust chokes them out.