A pet enclosure includes an expandable cover and a collapsible support frame. The cover comprises a roof, a floor opposite the roof, and sides connecting the roof to the floor, wherein the sides include a first side and a second side opposite the first side. The support frame comprises a first truss adjacent the first side, a second truss adjacent the second side, and a support member extending from the first truss to the second truss. The first truss and the second truss are pivotable relative to the support member toward one another into a collapsed configuration of the support frame and away from one another into an uncollapsed configuration of the support frame. Pivoting the trusses from the collapsed configuration into the uncollapsed configuration rearranges the cover from an unexpanded arrangement into an expanded arrangement. The cover in the expanded arrangement defines an interior compartment for housing a pet.