Patent ID: 7114464

Claim:
A cage comprising an enclosure having a door, and a waste-treatment tank attached below the enclosure and having a holding tank having an open top; a top edge; a sidewall having an opening facing the door of the enclosure, an outer door mounted in the opening in the sidewall, an internal chamber defined in the holding tank, multiple vertical partitions mounted inside the internal chamber and having multiple holes defined respectively in the corresponding vertical partitions to provide a baffle effect, a horizontal partition mounted perpendicular to the vertical partitions, having a top surface and forming a first chamber facing the trap, multiple middle chambers, and a final chamber, multiple filter tubes mounted on the top surface of the horizontal partition, communicating with the middle chambers and having multiple filter holes, an outlet formed through the sidewall in the final chamber, and a vent tube mounted through the sidewall in the final chamber; and a holder mounted in the open top of the holding tank and having a top edge, a lip formed on the top edge and mounted on the top edge of the holding tank, a sidewall having a bottom edge, a waste-collection tray formed with the sidewall and being inclined down, having a flushing hole defined in the waste-collection tray, a trap connected to the flushing hole in the waste-collection tray, and an opening defined in the sidewall and corresponding to the door of the enclosure.