My puppy does not want to eat?

I would ask the people that she stayed with what kind of food they feed their dogs and get some of that and mix it with her old food to see if she will eat some of that. I have a new puppy that would not touch the food that she was being fed at the store I bought her at after she ate the food that my mom's dog eats, so now she gets fed the kind that she will eat mixed with the other. It might be hard to get her off the canned food after you have started that but I think it is worth a try. Good luck.