The domesticated silver fox is the result of nearly 50 years of experiments in the Soviet Union and Russia to domesticate the silver morph of the red fox. The breeding project was set up in the 1950s by the Soviet scientist Dmitri Belyaev. As a result of selective breeding, the new foxes not only have become tamer, but more dog-like as well.

The domesticated foxes exhibit both behavioral and physiological changes from their wild forebears. They are friendlier with humans, put their ears down (like dogs), wag their tails when happy, and have begun to vocalize and bark like domesticated dogs. They have also developed color patterns like domesticated dogs and have lost their distinctive musky 'fox smell'.

The Russian researchers have partnered with the American company SibFox to distribute these foxes as pets internationally.