ggrap, do you have a quiet, warm place to keep her until you determine her condition? A dog kennel or cage in the house or garage, where you can lay her on a blanket or towel and provide softened food and water?
I agree with debi, first determine whether the legs are indeed broken.
Thanks. I don't know how long she can be temporarily stunned, but it has been almost 24 hrs. She is back in the house in a box. She will eat, but can not move herself. She just lays there.
Give her time, she may be shell-shocked still. Can you see her legs, see if anything is going at a weird angle? Can she move her legs? She may also have a back injury, but I'd give her several days and then reassess.