I just notice today that there is a sizable tuft of fur missing on my bunny's leg (I guess would be the thigh area). Should I be worry? He is a part of a bonded pair but they've been getting along well.
Does his skin around the area look inflamed, dandruffy or scabby? If his skin looks fine and it's just the fur missing, it could just be a one-off "get out of my way!" nip from the other bunny. Keep an eye on it.