Waste-containment enhancement device for simple litter pans

A new removable device for increasing the ability of a simple rectangular litter pan to retain wastes, which without the device might have been voided over the side of the pan by a pet within the pan, by intercepting and redirecting the wastes to the litter within the pan, which device comprises an intercepting and redirecting means open at the top and bottom having four inclined sides joined at the corners, constructed of deformable polymer material of the approximate thickness of the litter pan material, exhibiting approximately the same length ratios as the lengths of the sides of the litter pan rim, and sloping smoothly inward from top to bottom such that when the intercepting and redirecting means is mounted on the litter pan, its upper margin, which may incorporate a stiffening means such as a circumferential flange or thickened area, delineates an opening outside and above the rim of the litter pan and its lower margin from which intercepted and redirected wastes drip or fall to the litter within the pan, delineates an opening inside and below the rim of the litter pan, the outer surface of which device rests on and more or less continuously contacts the interior edge of the litter pan rim which supports the device along the line of intersection of an imaginary plane horizontally intersecting the device's inclined sides and containing the rim of the litter pan.