He looks small, but he's bigger than my dwarf crosses, he weighs 2kg at the moment and his ears are 8.5 cm (i think). Also I'm building him a bigger cage (the one he is in is temporary). Do you think 4ft by 5ft is okay for the run and 4ft by 2ft by 2ft for the hutch on top. Also he gets free range exercise each day so he's not always confined.