Absolutely, positively a domesticated rabbit should not be housed outside.....esp in a cage on the ground for crying out loud!!!!! The poor thing could have a heart attack when a predator tries to get to it...and they will, sooner or later. Besides the water and food will freeze almost immediately and a rabbit has to be able to eat pretty much 24/7. Also domesticated rabbits need interaction with people or they become afraid of them and unmanageable....and then people wonder why their bunny doesn't love them anymore.

That is a terrible situation and that rabbit needs to be removed by the owner in to the house or to a humane society/sanctuary.
And yes, Twisterdog is right on the money, why have a pet you don't/can't interact with! Dumb, dumb, dumb!