Cockfighting—the brutal spectacle that pits specially bred roosters against each other in a bloody fight to the death—makes the news occasionally. The cruelty behind the headlines is always the same. In November, for example, law enforcement officers in Indiana, assisted by rescuers from the Humane...

An unknown number of dogs were chained in the woods on a recent Sunday morning, and rescuers could hear them barking before they saw them. According to the U.S. Department of Justice, the joint rescue in September is believed to be the biggest takedown of an alleged dogfighting operation in South...