Abstract: A pet washing system with front and rear walls, two side walls, and a roof that is slanted downwardly from front to back. A dividing wall is between and parallel to the front and rear walls and between and perpendicular to the first and second side walls, thereby defining first and second areas within the rectangular structure. A first gap is situated directly underneath the bottom edge of the dividing wall between the dividing wall and the floor and configured to allow fluids to pass between the first area and the second area. A second gap is situated directly above the top edge of the dividing wall between the dividing wall and the ceiling. A plurality of louvres within the second gap is configured to allow air to pass between the first and second areas. The floor is slanted to direct liquids into a sump in the second area.