Though black-footed ferrets sometimes eat squirrels, mice, and other rodents, prairie dogs are essential to their survival, making up the majority of the ferret diet. These voracious predators ...

In the early 1900s, the United States was likely home to more than 5 million ferrets. But ferrets, which hunt prairie dogs for food and live in their burrows, were almost wiped out early in the 20th ...