Did you use the Corid or just try to get her eating? Watch to not give a lot of people food, but stick mostly to chicken feed for 90% of her diet. It has all she needs and will keep her poops more healthy.
Do you have any Corid to start treating her for possible coccidiosis. Without a fecal float done on some of her droppings by a vet, it is hard to know exactly what has made her sick. Keep offering fluids. If you start Corid, dosage is 2 tsp of the liquid or 1.5 tsp of the powder per gallon of...
I would give the chicken electrolyte water or water with sugar 1 tsp per cup, and dip its beak if needed. How old is she, and does she lay eggs? Do you have any poop pictures? Yes, egg withdrawal time is day one and then until 14 days after the end of dosing. Only a small amount of medication...