DISCLOSED IS A LIQUID-PERMEABLE PANEL (3) THAT IS OF A SYSTEM TOILET (1) FOR ANIMALS AND THAT CAN PREVENT URINE WETTING RESULTING FROM TORSION OR FOLDING OVER OF A PEE PAD. THE LIQUID-PERMEABLE PANEL COVERS THE EXCREMENT CONTAINMENT SECTION (21) OF THE SYSTEM TOILET FOR ANIMALS. OF THE AFOREMENTIONED PANEL, THE SIDE-SURFACE 1 CM COMPRESSION DEFORMATION LOAD, WHICH IS THE LOAD NECESSARY FOR AT LEAST 1 CM OF TORSION TO ARISE WITH RESPECT TO LOAD FROM THE SIDE-SURFACE DIRECTION (X) THAT IS PERPENDICULAR TO THE DIRECTION OF THICKNESS OF SAID PANEL, IS AT LEAST 5 N AND NO GREATER THAN 20 N. PREFERABLY, THE LIQUID-PERMEABLE PANEL HAS A PLURALITY OF HOLES (31) THAT PENETRATE SAID LIQUID-PERMEABLE PANEL IN THE DIRECTION OF THICKNESS, AND HAS AS A MATERIAL CORRUGATED CARDBOARD WHEREIN LIQUID GOES THROUGH THE AFOREMENTIONED PLURALITY OF HOLES, PASSING THROUGH IN THE DIRECTION OF THICKNESS OF THE AFOREMENTIONED LIQUID-PERMEABLE PANEL. FIG. 2
