Shadow Won’t Be Released Into The Wild
Since Shadow has been domesticated, it wouldn’t be safe to return him to the wild. Though silver foxes are the same species as red foxes, they need to grow up in the wild to retain certain skillsets.
If Shadow was wild, then he would have behaved very differently around humans. While his calm demeanor is advantageous in civilized areas, it is a handicap in the wild. Since Shadow is too domesticated to live on his own, he’ll need a permanent home.