in the pet shelter such that the interior temperatures change progressively across the compartments to blend into the temperature of the outside environment application_number US 60133606 A description as illustrated in fig1 and 2 a preferred embodiment of the present invention is a pet shelter 10 containing a first compartment 80 and a second compartment 90 a housing 20 of the pet shelter 10 includes a roof 22 two side walls 24 a floor 26 a door frame 50 a middle frame 60 and a back wall 70 as shown in fig3 the door frame 50 and the middle frame 60 each has a projection 32 at each bottom end for coupling to a corresponding slot 27 on the side of the floor 26 the floor 26 having a front and a back further contains a groove 34 at the back with sufficient depth for receiving and supporting the bottom of the back wall 70 a tray 28 is placed on the floor 26 for receiving the droppings of the pet which is removable for the disposal of droppings and cleaning the roof 22 is attached to the top of the door frame 50 the middle frame 60 and the back wall 70 for example by a hook and loop fastener.