LODI, NJ—The moist, brownish pile on the Gehrke living-room floor is either cat food or cat shit, it was reported Monday. "If I had to guess, I'd say it's cat food," said Lydia Gehrke, 44, staring at the mystery heap. "But the way Oscar's been digesting lately, cat shit is definitely a possibility, too." Though a long shot, Gehrke noted that it could also be cat vomit. "Whatever it is," she said, "it came from the cat."