Abstract: A removable device that is used with the bottom part, or crate bottom (50), of modular dog crates having a plurality of solid walls and an additional wall with an entryway cutout (52) to create a temporary pet bathtub enclosed on all sides. The device comprises, in part, a rigid, waterproof panel (12) with an elongated transom (16) affixed to its top edge. A gasket (18) is affixed to the edges of the panel (12) which abut the entryway cutout (52) to ensure a watertight seal between the panel (12) and the perimeter lip of the entryway cutout (52). Alignment hardware (20) and fastening devices (22) are affixed to the panel (12) and transom (16) to aid in the positioning and securing in place of the device in the entryway cutout (52). One or more drain assemblies (24) pass through the face of the panel (12) to provide a means of draining the crate bottom (50) after it has been filled with water.