Imagine a chicken. Picture her downy white feathers and small, intense eyes. Maybe she’s sitting on a nest, softly clucking. Perhaps she’s scratching in the dirt, a quaint red barn in silhouette behind her. Cows graze contentedly nearby; a pig snuffles in the mud. It’s an idyllic vision, familiar...

Around the world, animals used for meat, eggs and dairy often suffer on factory farms where they are treated as units of production rather than living, feeling creatures. The Humane Society of the United States and Humane Society International present comprehensive reports on animal agribusiness and...