A pet crate is provided having a blow molded polymeric base along with side, front and top panels made with strong, lightweight polymeric frame members and grates. The grates are used in the front, back and side panels to provide strength as well as a large open mesh area for better visibility and pet comfort. The mesh preferably is provided as hinged access panels at least on the sides. The front and top of the crate are also openable for access to the pet crate. The pet crate is collapsible to a folded, flat condition by unlatching the front panel and stowing it along the inside of the top panel and releasing latches between the top and back panels and the side panels. The side panels, back panel and top panel can then be collapsed inwardly onto one another to form a generally flat, stowed configuration for the pet crate.