The invention provides an unmanned wheeled vehicle for transporting litter material to or within an accommodation for an animal with a container to hold a quantity of litter material and a dispensing opening to dispense litter material from the container. The container has a filling opening and a filling opening cover which is movable between a closed position, in which the filling opening is covered by the filling opening cover and an open position, in which the filling opening is, at least partially, not covered by the filling opening cover to allow the container to be filled with litter material. The container further has a pusher element movably arranged in the container and configured to push litter material towards the dispensing opening, and wherein the filling opening cover is configured to be moved from the closed position to the open position by a movement of the pusher element.
