I made a tent type bed for my piggies (pics below). Basically I sewed two pieces of 18"x21" fabric together, a cotton piece and fleece piece, and then sewed three of the sides together inside out. Once they are sewn, there is a opening where you haven't sewn and you pull it through so that the seams are hidden. Then I added two grommets so I could hang it up to keep it open. I hope that made sense lol if anyone would like more detailed picture instructions I can do that as I should be making some more tomorrow. I made these for my rats for the last few years and decided to up the size and see if the pigs liked it.