Diatom aka diatomaceous earth is a totally natural product which is microscopically sharp enough to pierce the skeleton of red mite and other insects. The piercing allows for the insect to dehydrate and die. It is not a quick kill but over time is effective.
ProBed is an excellent bedding for chicken coops. Highly absorbent and nice smelling with added antimicrobial treatment. Dust free. Can be used on the coop floor and in nest boxes. A little goes a long way.