By Tom Dodge Sports Editor Eunice High’s Gabby Mitchell hit a towering walk-off home run in the bottom of the seventh inning Thursday to lift the Lady Bobcats to a 13-12 win over the Mamou Lady Demons. Mamou jumped out to a 6-0 lead in the top of the first inning aided by several EHS errors. Eunice closed the gap to 6-1 in the bottom of the inning on a home run by lead-off hitter Sophie Vidr…