Tray of whole hog, brisket & pork ribs with sides at CattleAck BBQ in north Dallas (Photo ©Chris Wilkins/Texas BBQ Posse) The Posse first caught wind of CattleAck BBQ in May 2013, when Jim Rossman picked up some Twitter buzz on a new joint in north Dallas near the Galleria. Jim headed up on the tollway to investigate, finding a promising new player on the DFW barbecue scene. After success in the catering business, owners Todd and Misty David decided to open on Fridays from 11am until the meat ran out. A full Posse contingent made a followup visit  to…