Why are wolves associated with regeneration?


In the manga _Noblesse_ , wolves' main attribute is their regenerative
abilities (like Wolverine). Same with Ban (fox) from _Nanatsu no Taizai_.

Are there some explanation on why fox or wolves are associated with healing or
regeneration abilities?




In Ban's case, the fox is linked to his sin of greed, because he drank the
fountain of youth. But I guess in Japan, their ability to heal comes from the
Fox Demons called Kitsune which have a variety of powers.

And I would guess the wolves' healing comes from the Werewolves Tales where
they would heal any wound immediately if it wasn't inflicted with a silver
weapon.

