I keep my bunnies in a large ex-pen, and I've been struggling with flooring since I got them. I didn't want them running around on hardwood floor so I put down a tarp at first, but they easily scratched and chewed up the edges. I'm also looking at foam puzzle mats, but I'm afraid they would chew or scratch that up too easily. I've seen some people on here mention vinyl or linoleum, but I can't find many of cheap options of amazon. I just want something nonslip, affordable, and waterproof. Any recommendations? (Links would be appreciated!)