The photos pretty much speak for themselves. The heart, liver and body cavity were covered with white, mold like like stuff. There was also some yellow fluid in the abdomen. Yolk maybe? The hen in question was an 9 month old BR mix. She had been acting fine, eating, drinking, etc. Last night I noticed her standing by herself, but when I walked toward her, she ran away, and seemed alert. This morning she was laying in the coop dead. Every one else is fine. I haven't had a sick bird in the flock for probably 6 months. What are your thoughts? Any idea what the white stuff is? Maybe some type of infection?