Every Werewolf needs an anchor. My sisters are both of mine.
There is no werewolf that can live without an anchor and be sane. It's physically and mentally impossible. One werewolf without their anchor can rampage and take out an entire village without showing mercy.
An unanchored wolf is a dangerous wolf which is why I worry about myself sometimes. I've already lost one anchor, what would happen if I lost the other?
What would happen if I lost my control? How could I regain it? Clint Barton has answers to both those questions.