Foxes are members of the genus Vulpes within the family Canidae. Although a few other Canid genera may be called "foxes", this is the genus of "true" foxes. The most well known and prolific species is the red fox Vulpes vulpes, a native of Europe and Asia which has been imported to all continents on Earth except for Antarctica. Foxes have long had a double-edged relationship with humans, being regarded as livestock-raiding pests and a target of hunting for this reason, as well as for fur clothing and sporting trophies, but praised in folkloric literature for their cunning in the face of danger.
Following the Big Fracas, genetic engineering became a popular way to curb the undesirable traits of humans. New innovations led to an interest in modifying other species under the same theory. Dmitry Belyaev's 20th-century experiments with foxes were remembered, resulting in the new trend of keeping vulpines as pets. Joe and Daisy Mae were examples of this.
Foxes were among of the few animals living atop the Glacier, and were preyed on by humans there. When Marcovefa came down into the world below and saw dire wolves for the first time, she thought of them as big foxes, that being her only frame of reference.