The rabbit is always aware of its surroundings.  As prey to other animals, they must be clever and fearful of being caught.  A rabbit spirit guide showing up may signal that you are being afraid.  You need to ask yourself if you are worried and seek help to take the "leap" forward.  As an underground dweller, rabbits disappear at the first sign of danger.  This signals that defending yourself doesn't always involve fighting, but the best move may be to avoid the danger.