I wouldn't make a drastic change in her diet just yet. She hasn't been home very long, and it takes a while for them to adjust to they're new sutrroundings and people.
I would keep her diet the same for now until she levels out with her weight. Once she is settled in, then I would very slowly start on her diet changes. They will starve themselves before they eat something they aren't really used to or sure about. I'm glad she started eating, just keep an eye on her weight.