She sounds sweet.
I am glad you chose to adopt her.
Maybe she came from a breeder who sold her to someone who did not care enough for her to keep her safe.
She came from a top notch breeder, has her papers, and is a beautiful specimen of her breed.
But she was neglected in many ways, and was badly hurt when hit by a car. Lack of nutrition and getting hit by a car really messed her up.
Oh, and her nickname among family and friends is "Devil Dog", though her real name is Maggie.