Not exactly. They bred an aggressive population alongside the tame one, and it's now 60 years: https://www.nationalgeographic.com/animals/2018/08/fox-dogs-wild

Not exactly. They bred an aggressive population alongside the tame one, and it's now 60 years: https://www.nationalgeographic.com/animals/2018/08/fox-dogs-wild-tame-genetics-study-news/ https://www.nationalgeographic.com/animals/2018/08/fox-dogs-... "Researchers have bred more than 40 generations of friendly and aggressive foxes." I read a really interesting article mainly about the aggressive ones, but I just spent a few minutes looking for it unsuccessfully.