You’d think it would be easy to persuade people to protect prairie dogs: Not only are they a keystone species, with nine other species directly dependent on them for survival, but they’re also irresistibly cute, with big eyes and big personalities. Yet the personable little rodents often find...

Fur factory farms and trappers kill millions of animals each year using brutal methods just for their fur. With your help, the Humane Society of the United States is fighting back—and winning—with brands, cities and countries moving away from fur. But to make progress, we need you. There are five...