If she won’t eat, you could try tube feeding. Aquarium air tubing from the fish aisle at Walmart or pet stores can be used with a 35 ml syringe from a feed store to give liquids and thin foods. Cut an 8 inch length of the tubing, and melt the cut end with a lighter to soften the sharp edge. In the photo below, the hole at the base of the tongue must be avoided, but put the tube down the right side of the chicken’s throat (where the syringe is) and pass the tube down to the crop. That is about 5 inches in 5 pound hen.