RIP Roo. I left the house to run errands. Came back and he was gone. Sigh.
This am:
He was getting such beautiful coloring!
I am now officially turning this post into a WHODUNIT???
So after I knew he was gone, I decided to do an autopsy on the little guy. Before I started, I noticed that an area to the right of his breastbone/keel (?) was a bit soft and maybe filled with fluid. That area was filled with clear fluid and appeared to have been maybe one of his air sacs?????
His crop was almost totally clear of anything, gizzard with grit but not too much, and all others organs appeared normal. No lumps, bumps, lesions, abnormal fluids, etc.
Intestines and rear end had mashed chx food, evidence of greens and the like in them. Intestines did have a ball of foodstuff about the size of a grape just before the exit, but it was soft, so I don't think there was any impaction going on.
I forgot to add that a couple of times he did exhibit a small tic-like motion with his head. I had been thinking it was related to lack of fluids and lytes, but maybe it is a symptom of the illness itself?
On a really good note: All 25 of my other adolescent chickens seem to be healthy today!!!