A pale face doesn't mean she is dying or is for certain going to die. My hens get pale faces when they get dehydrated or when they've been laying in the sun too long, there's a variety of reasons a chicken can get a pale face. My Buff Orp has a naturally pale face and she's healthy and almost 3 years old now.Is it true that a pale face means she is dying? My sister told me that over the phone. She is still walking
How is she doing today? How did her crop feel this morning? See any mites/lice last night? Can you post a picture of her vent? Lots of questions.
I'd continue to monitor her and feed her a scrambled egg/canned tuna/wet mash and get some fluids in her.