Implementations of a rack for animal cages are provided. A rack may be comprised of multiple levels stacked together in a vertical orientation. In some implementations, each level of the rack acts as a frame configured to support thereon one or more tubs (i.e., cages). In some implementations, each level of the rack may be comprised of top panels, glides, joint connectors, vertically oriented legs, and cross beams. In some implementations, two glides may be positioned on a level of the rack to support a top panel and tub therebetween. In this way, the glides hold the top panel in position over the tub and thereby prevent an animal from escaping the interior compartment(s) of the tub. In some implementations, a level may be further comprised of a bracket having a lip thereon. In some implementations, the bracket may be used to reinforce the unsupported edges of the top panel.