An animal enrichment device for use in an animal cage having a cage bottom, the cage bottom having a peripheral lip with recesses defined therein. The enrichment device can comprise a floor on which the animal may perch, a first set of opposing walls extending up from the floor and a second set of opposing walls extending up from the floor. A flange portion can be disposed at the top of each of the first set of opposing walls, each flange portion having a top surface. The flange portions are dimensioned and shaped so that when the animal enrichment device is disposed in the cage bottom, the flange portions can be received in the recesses defined in the peripheral lip of the cage bottom such that the top surface of each of the flange portions is flush with the peripheral lip of the cage bottom, and wherein the floor of the enrichment device is positioned above the floor of the cage bottom.