These are plans for building 3 large outdoor cages together. If you only have one rabbit, or two, you may have them inside with a nice cage and a tray. This will need to be emptied everyday and filled with shavings or you can use cat litter...
When asked to build granddaughter an indoor rabbit hutch for her second birthday, I was forced to acknowledge that I knew very little about rabbits and hutches and in fact I had never even heard of an indoor hutch.