With three rabbit pairs the house was well received, immediately accepted it as a shelter. Smaller dwarf rabbits do it, even through the window in and go out.
The flat roof, the rabbits have an extra sitting, they also use a lot.
The rabbits do not belong in a cage, where then possibly not even enough space would be to sit in the house, you can not mention often enough. For me there are houses in the enclosure and in the winter serve as huts in the large hut where the rabbit better to keep warm.