OH honey... I am sooo very sorry to hear this. We went through this exact same thing close to a year ago, but boy does this bring back some memories.
I told you before that I liked your dog's name because that's my daughter's name.... well my Maggie fell down with Pixie when Pixie was about 4 months old. It shattered Pixie's elbow and she had a clean break across 3 toes (reconstructing Pixie's elbow was her first surgery). I was horrified: 4 broken bones. And worse yet was when Maggie realized what happened. She is still heartbroken over it.
On the up side, bones heal and hearts mend. Maggie learned a big lesson that day that she still remembers today. Several lessons: #1 being don't touch my dog LOL but she also learned how fragile yorkies and baby dogs really are. She learned that they're really real and have feelings. I know it's rough, but take the opportunity to let your daughter learn
Some lessons have to be learned the hard way - I wish I'd known how fragile Pixie was before, and she'd never have had to go through a lot that she did. But I learned my lesson, too. Maggie is now overly protective of Pixie. She won't let any of her friends pet her because she's horrified that someone will break her again.
I know it's a rough time... and it'll be a stinky one, too

They do have some spray shampoo that you can bathe your dog without getting her wet. We had gotten some from the pet store while Pixie was in a cast (for almost 4 months). It's not the best stuff in the world, but it helps
Give your daughter a big hug for me... and let her know that everything's going to be ok. Your Maggie's bone will heal up and she'll keep growing and her fur will grow and she will be able to walk and one day, you'll never be able to see that anything happened
**big hugs** to you! I'm here if you need me