I guess I don't have my phone set up correctly to receive notices of replies. I missed your's FrostRanger!
I did indeed lose another hen. So that's 2 since the weather turned hot.
I contacted a vet that does the poultry for a vet clinic in Stillwater, OK. He gave me some advice, but unfortunately, I think it was too late. 106° Farenheit is HOTTT and that, in combination with whatever ailment this was, proved to be too much for her. I injected her with whatever he'd advised, but alas... 6 hours later she succumbed.
So. 3+ weeks have passed....
And now, I wonder about ANOTHER thing I've noticed....whether it may be related. I've got some young additions to my flock: 6 Bielefelders and 3 Black Australorps. All pullets, about 3 1/2 months old. Occasionally, I'll notice some moisture on my hand, when hand feeding them snacks. (Fancy Scratch Grains)
On 2 occasions now, I've observed this 'liquid' coming from their mouth while pecking the grain... in a large enough quantity that some of the grain clings onto my previously dry fingers.
It's not unlike a dog might drool in anticipation of his favorite treat. It isn't really mucous-like so much as it's just a watery discharge. From their mouth.
I've not observed nasal discharge, or sneezing. No watery eyes or swelling.
I had had already considered, but did not pursue a necropsy, mostly due to time constraints. But also the veterinary I spoke with at Stillwater, sort of calmed my fears, stating nearly ALL chickens wind up with Mycoplasma.
I had mentioned to him that I was paranoid about Mycoplasmosis and he asked "why is that? Chickens nearly all get it."
So.
Is this very occasional watery discharge when eating a normal chicken thing? Chicken Slobber?
I'm only about 18 months in, and still have lots to learn!