(GRAPHIC PIC) dead hen autopsy: large discolored liver

[BBUTTER]

We lost a hen today and did an autopsy. I'd love some help figuring out what caused her death. I want to be sure it wasn't something contagious. Y'all know how things can spread so quickly. No mites. Feathers were fine.Vent was normal. No external or internal signs of worms of any kind. Crop and stomach were empty. No bound egg. This is what we found:
What could cause her liver to look like that?

 

[BBUTTER]

Just bumping this up in hopes of some hits. She seemed fine in the days leading up to her death. I came across Big Liver and Spleen Disease on Google, but that seems much more serious than her case. Also, her spleen looked fine. We haven't had any other deaths or illnesses.

 

[Stormy Autumn]

What about Vibrionic Hepatitis ("spotty liver")? I don't really know anything about it, but here are some links I found:

http://www.octagon-services.co.uk/articles/poultry/avh.htm
http://www.thepoultrysite.com/diseaseinfo/163/vibrionic-hepatitis-avian-infectious-hepatitis

If you go to the Vibrionic Hepatitis section in this last pdf, there is also a short list of other diseases that cause lesions on the liver, so you could look those up too...
http://pods.dasnr.okstate.edu/docushare/dsweb/Get/Document-2118/VTMD-9109web.pdf

Or maybe it's worth it to take the liver to a vet and get an expert opinion?
I'd be worried about it being contagious, too.