They eat on their schedule, and now that she is at 1100 grams there is also the "wall" to take in consideration.

Things I would do are downsizing to a 15 quarts run.

Offering smaller preys 50/60 grams

Things I would not do is offering love, if she eats F/T she will again, it's all about finding what can trigger her and be PATIENT.

And if she is a smaller female that is healthy but eat less and grow slow, It's ok.