Just got results:
09/14/11:
Gross examination of this chicken revealed changes consistent with both a neoplastic and inflammatory processes, most
likely carcinomatosis (pancreatic or oviduct/ovarian origin) with a secondary severe inflammaiton. Histopathology is
pending to characterize these changes, infectious agent testing is completed and all are negative.
So apparently, she had cancer. At least it's not something infectious.