Yeah and if you're worried about building her up slowly, you can offer small-ish small rats (about 50 grams), then one around 60 grams next time, etc. Same for mediums, they can vary in size so start with feeders around 85-90 grams and build up to the heavier ones.

Boas are pretty tough and she'll likely bounce back from this just fine with some TLC. Good job with the rescue.