"Willow has come so far. She's developing and growing just like a normal puppy would," says Williams.
Today, Willow's former littermates - the perfect puppies who used to frolic in the yard while she lay paralyzed - have nothing on this 8-month-old wonder dog.
"She's a very, very special young puppy," Williams says in the clip. "She's very self-assured. And that's probably what helped her to survive. Because she knows what she wants and don't get in her way."
Indeed, this little puppy, once written off as a liability, was offered instead a world of possibility. And she dove right in.