normally die a great deal earlier than house rabbits.
indoor rabbits can be house trained, and so can be let out to run about at supervised times. this means that their cages need not be as big as outdoor bunnies, which need large amounts of space to be happy. an indoor bunny cage should be large enough for your bunny to lay down in comfortably, with a corner to spare for droppings, and a space for food. because your bunny will get lots of exercise when it is out, and mostly use the cage for sleeping, it does not need to be all that large, though it should not be cramped 