Abstract: A litter box system comprising an open-top container and an enclosure that defines a chamber, an exterior, an entrance, and a first opening located between the entrance and the chamber. The enclosure includes a housing and a door having a first position and a second position. The container and chamber are shaped so that the container may be placed in the chamber in an upright position and the entrance allows access to the container when the container is located in the chamber. The first opening is larger when the door is in the second position than when the door is in the first position, so that the container can be removed from the chamber in the upright position.