Very sorry for your loss. Glad your vet could assist you. When I lose a chicken, if I am able I usually perform a brief necropsy to look at her abdominal organs, her gizzard, and crop, and look for any worms in the intestines. It is not something everyone wants to do, but I have learned a lot about the common illnesses. If you ever want to do that, pictures of the organs can be posted here, and others may have comments. I have seen various reproductive disorders p, discovered water belly, and cancer.