Pictures of a necropsy are normally shared here with just a warning that they are graphic. Was the green fluid inside her abdominal cavity? Ascites fluid inside the abdomen can be yellow, amber, or sometimes green if there is a lot of bile. Ascites is fluid in the abdomen from liver disease, and is secondary to such problems as heart failure, cancer, and egg yolk peritonitis. Sorry for your loss. A necropsy with lab studies can be done by your state vet if the body is kept cold, but not frozen. Here is a list state vets:
https://www.metzerfarms.com/PoultryLabs.cfm
https://www.metzerfarms.com/PoultryLabs.cfm