You know. This weekend I put together those Target shelves and used the ties. And I thought it was so unstable, I was surprised so many people love it. The connectors (the plastic ones that come with the packet) are always falling off and the whole thing is just not a very sturdy cage, from my perspective. I used carpeting and then some material my mother gave me used in boating that has like a plastic that you can wash. Over that I put a combination of pine and hay. Underneath the carpet. I tore up a box and made it into a holder inside the shelving. The cage is about 2x4 with a small second story. I used a piece of cardboard and made small indentations to allow them to climb up and down. They aren't fond of it, but they do use it when they want to get into their cubby hole. I also put a litter box in there with my rabbit litter inside, hoping they will use it. It's a mess and gets pine all over. Plus, to top all this off, I think I am allergic to my pigs. And I rescued them from a shelter. Talk about heartbreak all around.