Thanks for all the wonderful comments. I will post a longer reply tomorrow but just wanted to say how grateful I am for the suggestions.
There has been some improvement over the last few days. She seems to be interacting more with the family. She walks a little more, especially when I have my daughter running in front of her. She likes following other dogs.
We tried "bribing" her with yummy smelly cookies but she lost interest after the first day. We are still unable to get her to walk more than half a block... but I feel less hopeless than I did just a few days ago.
I will upload more recent pics tomorrow as she is already much bigger (14 pounds).