Well, some ferrets don't even like other ferrets, so whether or not your ferret would like a mink is difficult to say. I read your post about finding the injured mink, and it looks like you've gotten some good input. While it's true an injured animal often fasts, you know the metabolism of these little weasles - they need lots of calories. "Ferrettone" or some other high calorie supplement would probably be a good thing. And by all means, if you can aquire some lactated ringers, sub-cutaneous (under the skin) fluids may be critical. If the little critter has broken ribs, a punctured lung is probable. Does your vet see ferrets? I sure hope you're able to either help it, or find the srength to have it humanely euthanized. So sorry, but good luck - I'm hoping for the best!