On a freezing, rainy Sunday night, cold beer flows freely at the weigh-in and judging phase of the Parlin Buck Club’s fourth Annual 24-Hour Predator Killing Contest in Barnegat, New Jersey. An undercover investigator for the Humane Society of the United States films a group of men laughing and posing in front of about 15 dead foxes hanging by their feet from a rack. Several weeks earlier and a few hundred miles away, our investigator filmed participants in the Bark at the Moon Coyote Club’s New York State Predator Hunt in Macedon near Lake Ontario, as they placed the animals they’d killed in rows outside a restaurant. About 200 animals were piled…