BingoPaw Clear Dog Playpen Fence: 10Panels Indoor Transparent Whelping Box Pen Cage with Waterproof whelping pad - Extra Long Acrylic Exercise Kennel with Metal Frame for Doggy Bunny Small Animal

As a prey species, they don't like things that obstruct their vision, so getting something they can't climb, fall through, or chew through due to a lack of depth perception is key. Something like what I'm sending as a link below, then modify with more plexiglass on top, inward, with smaller panels at a 45° angle so they can't boost themselves or their cage mate up and over. https://a.co/d/02MxbEsX