It is now possible to clean a singlebox or calf pen while the calf is still there.
Simply pull the handle and the top cover underneath the calf will rotate and get scraped off.
A soft mattress under the top cover will provide comfort to the calf. By cleaning out several times per day you increase hygiene and avoid flies. Cleaning singleboxes just became very easy, unlike a labor-intensive traditional calf box, single box or calf hut.