
Oh what a shame, I haven't personally any experience of broken bones, other than toes, in dogs, but two friends dogs had similar breaks, one dog was kept on very strict cage rest, carried out to the loo etc and then very gradually lead walking introduced and increased, you would never know now that he ever had a broken leg, he's an international champion now, a beautifully sound mover. The other dog managed to get loose and run upstairs the day she came back from the vets, another time she jumped off the sofa etc etc and now 3 years later still limps and will need painkillers for life.
So, it seems to me that how well she heals is very dependent on how still you can keep her, and that is difficult with a young pup. You're going to have your work cut out keeping her entertained with brain games and puzzles, things that will tire her out without leaping around.
Try raw knuckle bones, kongs, lickimats and have a look on amazon at dog brain games.