Say hi to Gordon! By SARA VANDEN BERGE   One of this week’s featured pets up for adoption at the Erath County Humane Society is Gordon, a five to six-year-old shepherd mix with a big heart.   Found as a stray and never reclaimed, Gordon hasn't let that dull his friendly spirit; he's been making friends since day one.     Gordon isn't shy about asking for love and will happily let you know when he's ready for pets, belly rubs or a hug.   “He's done well with other dogs, but w