President Joan Cannelli of Golden State German Shepherd Rescue walks with four year old Drake at Cowell Community Park in Concord, Calif., on Monday, June 17, 2013. Joan had trigeminal neuralgia, a form of facial nerve pain, for about 5 years following

President Joan Cannelli of Golden State German Shepherd Rescue walks with four year old Drake at Cowell Community Park in Concord, Calif., on Monday, June 17, 2013. Joan had trigeminal neuralgia, a form of facial nerve pain, for about 5 years following a root canal until last year when surgery resolved her pain. (Photo By Liz Hafalia/The San Francisco Chronicle via Getty Images)