I am glad I got the extra run because I originally bought this for 2  Baby rabbits. If I had only gotten one it would have been to small. Unfortunately what I dont like about it is that its wobbly, And I feel as the rabbits get larger they will grow out of it pretty quick.  Right now I am using a small  litter Pan that fits comfortably in there and I use the nesting boxes for their bed , but once the rabbits get big and I need a bigger litter Box they will not have any Room.