I hope that she recovers quickly. We lived in a rental house for a year when we first got married that was really close to the road and our 1 year old golden retriever ran out the door one day before I could grab her and got hit by a truck flying down the road. I ran to her and thought she was ok because she ran over to me but when I bent down to touch her my hand went inside her chest.
We rushed her to the vet and she healed up really well. You might want to evaluate where Sadie's food is, we couldn't figure out why Daisy wasn't eating her food after she came home but she would eat from my hand... well finally I figured out that she was too sore to lean down to eat! Duh.. felt like a complete moron! Poor thing. I elevated her dish so that she didn't have to bend down and then she ate with her normal gusto. With Sadie having a hurt leg she will probably be lying down for a while (if you can keep her down) so she probably won't have that problem but just as an FYI - something to look out for.