Fox

Fox refers to 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 a long 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.

Fox in "It's the End of the World As We Know It, And We Feel Fine"
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 was an example of this.