A six-year-old was killed by a pit bull. He climbed a fence into a neighbor’s yard, and what happened after is anybody’s story. So as to look proactive and allay lawsuits, Buncombe County has placed a moratorium on the transfer to pet adoption agencies of pit bulls and dogs claiming pit-bull heritage. The moratorium may be lifted after completion of a probe of the Asheville Humane Society’s protocols and behavior assessments. Pit bulls already in the Humane Society are exempt and ready for adoption.