Hickory  By SARA VANDEN BERGE   One of this week’s featured pets up for adoption at the Erath County Humane Society is Hickory, a one-year-old Black Mouth Cur mix with a big heart and lots of puppy energy.   “This adorable girl came to us with her siblings through no fault of her own and now she's ready to find a family,” ECHS executive director Serena Wright told Beneath the Surface News .   “Hickory is a happy, playful pup who loves romping around with her dog friends and