Foxes have been domesticated in Russia like dogs since last 60 years.
This radiation was probably in response to a vacant niche opening up as the borophagines started to die-out, and not only marked the birth of all the dog species we know today but also heralded the appearance of three modern-day genera in the south-western USA: (true foxes).
Whenever and wherever this species first appeared, fossil evidence suggests that the modern Red fox has been in North Africa for the last 700,000 years and Europe for at least the last 400,000 years.
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In essence, it was around 10 mya that the fox lineage split from the wolf-dog lineage.
When the ice melted the Holarctic clade spread south and east, while the Nearctic clade spread north, the two meeting in central Canada.
Briefly, the creature that taxonomists currently think gave rise to modern-day dogs was a medium-sized (about the size of a coyote) grassland predator of North America called that appeared during the late Eocene, some 36 mya.
The caniforms subsequently diverged into three lineages (which we call subfamilies): the Hesperocyoninae (‘western dogs’); the Borophaginae (‘bone-crushing dogs’); and the only one still around, the Caninae, which includes the dogs, wolves, foxes, etc.