I own a wolf that was caught in the wild with a pack of wild dogs.... I've had her for 2 years now. The only time I see a wild side is at play time, as she can get aggressive. Other than that, she is fine. You'll find far more dog bites of humans than you wolf or fox bites...
I have been lucky enough to have been a part of the lives of both a fox and a deer. Both animals made excellent friends to me. I do believe they thought the same.
About the only thing you have to watch out for is as a Serapis said "The only time I see a wild side is at play time".
A canine durning playing, and also as a sign of affection likes to nip. At times they can bite a little hard.
A deer likes to play by rearing up and pawing with its hooves at you.
Both senarios can hurt.
Just be sensible and they will make great pets.
Allow them to have there wild side, because someday they may want to return to the wild.
Both animals sadly for me, but good for them, returned to the wild.
Serapis, do you have pictures of your wolf, would love to see it.
Always wanted a coyote or wolf, but the situation has never presented itself.