My old college room mate had a rabbit (along will probebly 20 other animals) and she used to put a rabbit harness on it durring the day, let it outside loose for hours and then call it back in for dinner in the evening where she would place it back in the cage for night. It couldn't believe my eyes when she did this. She lived out in the "sticks" so there was no risk of cars or anything but...the rabbit was outside in the lawn all day munching on grass and hopping down to the pond, ect. alone, unsupervised and unleashed. I'll say though...i've never seen a more relaxed and happy rabbit before.