operating mode fig5 the container that forms the second region 7 can be pulled partway out of the frame 3 shown partly cut away until the passageway 13 bears against the rear wall of the second region the user can then reach into the second region 7 move the passageway 13 upwardly into the first region 5 and twist the passageway so that the pegs 25 move into the laterally extending parts 29 of the grooves 31 whereupon the passageway is supported on the pegs and is in the aforementioned second operating mode in this position the container that forms the second region 7 can be taken out of the frame 3 for cleaning if the user lures the animal into the first region 5 before manipulating the passageway 13 the user can access the second region 7 without having to interact with the animal in one envisaged implementation the uppermost end of the passageway 13 may be configured to be close to or bear against an internal wall of the frame 3 when the passageway is in the second operating mode in order to prevent an animal in the first region 5 from passing through the passageway 13 to the second region 7 in another envisaged implementation the outer wall of the passageway may be smooth so that an animal cannot grip and climb the passageway and the passageway may project sufficiently far into the first region 5 to prevent an animal from climbing up and into the passageway 13 when it is in the second operating mode fig7 is a schematic cross sectional view of the enclosure along the line a a.