Preserving the buffalos Fate of Texas herd rests with donated bulls By BETSY BLANEY Associated Press CAPROCK CANYONS STATE PARK, Texas The rumble from stampeding bison used to shake the earth as thousands of the majestic animals thundered across these parts centuries ago. That sound has faded almost entirely now, and the fate of one of the last pure herds in North America begun by famed cattleman Charles Goodnight rests with a trio of bulls donated by media tycoon Ted Turner. The herd, once 250 strong, has dwindled to 53, and more than a century of inbreeding threatens it survival....