Abstract: This specification discloses a procedure and facilities for removing animal excretions from rubber particles used as stall bedding material for animals, such as horses. The procedure involves vacuuming the bedding material into a drum container and then wheeling and securing the filled container onto a skip-hoist of the sanitizing equipment. The hoist raises the container and deposits its contents into a holding hopper from which they are fed through a meter at a uniform rate onto an orbiting screener. The orbit movement and orientation of the screener segregates the animal excretions and hay from the rubber particles. The latter are steam cleaned and then fed onto a leaf-type vibrating screener for drying, sanitizing and insecticide spray coating. The sanitized particles are next vibratorily moved off the screener into a collecting drum. Waste extracted from the two screeners is conveyed onto an inclined platform for migration toward a waste collector.