You can try syringe feeding her squash or sweet potatoe baby food with chicken mixed in for protein. You can also add critical care if you have it. I put a drop of food where the lips meet. Often they will get curious and lick it off. When this happens, squirt a little more on. It can be a tedious process but it has always worked for me.
If you don't want to do babyfood, I know others who make a slurry. They put feeders and greens into the blender with Ca+ and vitamins, add a bit of water and blend until smooth. You can also syringe feed this mixture.