Neat Idea but I've heard rabbits can get bad diseases and Parasites from being kept on the ground. Rabbits can be the King of their bunny kingdom with this easy to make rabbit tower, they can shelter underneath too.
Catios are a great and safe way for cats to go outside! This can be a fun place for your cat to go and see the world. This can also defuse territorial issues between cats by adding more space! TIP: Just be careful to put it away from other animals reach.