Maverick  By SARA VANDEN BERGE   One of this week’s featured pets up for adoption at the Erath County Humane Society is Maverick, a seven to eight-month-old puppy that was adopted, then returned due to housing issues.   “This sweet, energetic young dog has a big heart and an even bigger love for cuddles,” ECHS executive director Serena Wright told Beneath the Surface News .     “One of his favorite pastimes is burrowing into blankets, and he's always up for a game with his b