President Joan Cannelli of Golden State German Shepherd Rescue hugs four year old german shepherd 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

President Joan Cannelli of Golden State German Shepherd Rescue hugs four year old german shepherd 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)