Sorry that she is close to death, and glad that you are giving her comfort. If you would like to know the cause of her illness, you can get a necropsy by your state vet or do one at home yourself. I don’t like to do them, but I have learned a lot about what goes wrong from doing them. Many take...
Sorry about your hen. My thoughts are that she probably has a reproductive disorder such as salpingitis or egg yolk peritonitis. Has she laid eggs recently? Antibiotics may or may not help. Crop disorders are sometimes secondary to another major illness. Green droppings are from not eating. She...