Gov. Kristi Noem’s assent from admitted dog killer to national watchdog is spurring howls of rage and disbelief on social media. President-elect Donald Trump’s selection of Noem, the South Dakota Republican who boasted of shooting a pet dog to death, as secretary of Homeland Security on Tuesday stunned political spectators. “Trump wants the dog-shooter to be his Secretary of Homeland Security,” author Stephen King told his followers. “We’re sure not in Kansas anymore, Toto.” Want more breaking political news? Click for the latest headlines at Raw Story. News broke in April that Noem’s memoir “…