A collapsible carrier for an animal comprising a base panel, the base panel having a first end and a second end and containing a floor surface wherein the floor surface includes upwardly extending sidewalls, first and second members end members hingedly attached to the upwardly extending sidewalls at the first and second ends of the base panel. Each of the end members have guideways wherein the base panel and the end members are configured to define an access opening to the base panel floor surface. A slidable door for closing the access opening is provided, wherein the slidable door comprises a leading and a trailing edge, the leading and trailing edge extending between the end members, including a portion that extends into the guideway of the end members. The slidable door is movable along the guideway in the end members to conform to the shape of the end members thereby extending over the floor surface of the base panel and the slidable door is also movable to a retracted position between the upwardly exte
