maybe you should consider the possibility of amputating her leg
... I mean, if anything can be done for her to walk normally, it would be great, but from what I see right now she can't walk for more than a few steps
, and I have seen cases of dogs in 3 legs who participate successfully at agility competitions. Look here:
. Especially her being so young she can learn faster to cope with the handicap.
Maybe until you get a final diagnostic you can try to tie her leg close to her so it doesn't get in her way when she tries to walk... I don't know, this whole thing is so sad
...