Given you have answers pointing to the Russian fur farm, so you know that foxes have been domesticated in recent times. So, why were they not domesticated 10,000 years ago along with dogs, or later along with domestic cats? read more
While small dogs are also good ratcatchers, cats probably were the earliest ratters in the human settlements and they were probably largely wild for a long time, gradually becoming domesticated and family pets as well as protectors of the food supply through selective breeding. read more