A pitbull named Jonny Justice is a certifies therapy dog who does this through Paws for Tales. Jonny is a Bad Newz survivor (rescued from Michael Vicks dog fighting ring) :)

http://1.bp.blogspot.com/_eBzOW5H7VhM/TRoKD_TpauI/AAAAAAAAAcY/FVLP0Dr4jp8/s320/jonny.bmp