Ok, I have given up cleaning, powdering, spraying with pink killing liquid, and on the advise of the vet I will be spending the weekend with a brush and a can of creosote in the hope of eradication the dreadful mites. Vet has given me something to spot onto each hen while the creosote does its work. The question is about all of the mites, lava, and eggs that I was cleaning out and putting on the compost heap for a long time before I knew they were there. Will they die from lack of hen blood to feast on? As the hens clamber about on the wooden frame and top of the compost bin will they be reinfesting themselves? If the compost mites aren't dead, what can I do about them now? The mites are black. Today I found a red one. Any thoughts? Tricia