JOHNS CREEK — Abby bolted for the splash pad, claiming one of the water spouts as her own by flopping on her side and rolling around trying to catch every last drop of water in her thick coat. The border collie was one of more than 150 dogs enjoying the grand opening of the Newtown Dream Dog Park on Wednesday.“They’ve done a really good job with it,” said Sandy Thurman, Abby’s owner. “She loves the water … this is really great.”The $500,000 dog park renovation was the brainchild of Pat McNeely and his dog Koda, who won the national Beneful WagWorld Dream Dog Park competition.