Thanks everyone. I was thinking today about the kidneys being those other organs, since I hadn't seen them anywhere else. I think that your explanations sound very plausible, and we'll consider it to not be a flock health concern. She had a good chicken life, and we'll remember her fondly.
Thanks. I have Gail's health book and general chickens book, but it only has some line drawings in black and white. There were two of the olive-shaped organs.
To add another possibility, what about an impacted crop?
The crop was about the size of an egg, perhaps slightly larger. The crop and gizzard both smelled a little off (I think) and there were some dime-sized pieces of green leaves. What does a normal crop look like?
It wasn't very hard, but...
Our Speckled Sussex hen died today, and I'm not sure of why. She seemed to be her usual self over the past few days, and we found her in the hen house on the ground. We suspect that she died and then fell off of the roost that was just above her. She was almost 8 months old and was one of 20...