What about the fox reaching it fulfillment and happiness , I think it's very selfish to keep a fox as a pet . They're only thinking of their self . I would rather see a fox living in the wild and not living in small fence in yard.
That Russian genetics program is controversial in that the aggressive foxes are extremely stressed and extremely aggressive, beyond what would naturally occur. And the "friendly" foxes are unable to access human attention regularly. And they're all in these tiny cages.
Here's another article about it: Article about the famous russian fox domestication experiment "in peril"