CINCINNATISnack experts warned Monday at 9:15 p.m. that the Pringles level within the Cody household had dipped to a dangerously low six inches and showed no signs of leveling off. 'If the depletion of the Pizzalicious Pringles sitting on the couch does not slow, the supply may dip to a fraction of an inch before the end of Everybody Loves Raymond,' said Carla Cody, who had been monitoring the potato-crisp reserve since 7 p.m. 'It is crucial that we explore such alternative snack sources as Goldfish crackers.' Cody then moved the can to the kitchen as a stop-gap measure. 