It has just been 7 weeks, and as you do not know much about her background, I would not resort to Prozac or other medications just yet. She is still getting used to being a loved dog, and this could be a very new experience for her. How is she on walks? Definitely interact with her as much as you can, and I bet a year from now you will have a happy, more secure dog.
Find what gets her attention - toys that move, or squeak, or even try bringing her to a park where she can interact with other dogs, and see if that perks her up, or scares her more ...
Do you have any other animals?
Bless you for going the rescue route - some dogs are untouched by previous experiences, but some can take a while to get over bad experiences.
Longer walks every day, and pay attention to what interests her. Break treats into small pieces so you can give them more often with our worrying about her weight. And if you get a chance, give her a little bellyrub from me! Sit with her and read to her, do lots of quiet, calm interactions with her, and you will see progress!
Bookmarks