Again, how old is she? How close is she to laying? Okay, I see you answered while I was posting. Try to get her drinking some fluids or electrolytes. I would probably go ahead and treat her for possible coccidiosis with amprollium—Corid, which you can get at most feed stores. Corid is safe, and even though she may have something else wrong, it won’t hurt her. Dosage is 2 tsp of Corid liquid or 1.5 tsp of Corid Powder per gallon of water for 5-7 days. Can you feel of her crop to see if it is empty and flat, full, hard, puffy, or doughy? It should be empty if she is not eating. Green droppings are usually from not eating enough. Chickens can suffer from organ failure, infections, and many other problems.