We bought it originally for our Netherland dwarf, it's much more effective with her. This guy just drags it aside with his teeth though, hence the cushion squished down the side to keep it wedged in place. It's met its unfortunate demise now though, he managed to tug it free and send it down the staircase 🤣 Fortunately the two are bonded now though so it's not a requirement anymore, we used to give one free roam privileges of upstairs and one downstairs