The system contains a molded plastic reticulated tray composed of a continuous rib that forms a tray rim and a plurality of intersecting ribs defining relatively large openings therebetween. A ventral access opening selectively provides access to the horse’s abdomen while the bandage remains in place. An adhesion strip is secured to the first exterior side surface being adapted to absorb an adhesive placed on the foundation wall for securing the moisture impervious sheet to the foundation wall.