lol, the incubating with friends thread is a TON of fun, and chats get rather random but if a REAL questions comes up it gets answered by some very helpful intelligent people...
i wonder if her crop may be impacted, that can cause a lot of the symptoms you've described too
https://www.backyardchickens.com/a/impacted-slow-and-sour-crops-prevention-and-treatments
read the part about impacted crops, this may be your problem, but if it is you need to figure out how it...
Numerous classic broad spectrum anthelmintics are effective against Capillaria worms, e.g. severalbenzimidazoles (albendazole, fenbendazole, flubendazole, mebendazole, oxfendazole, etc.), levamisole, as well as macrocyclic lactones (e.g. ivermectin). Some compounds with a narrower spectrum are...
see how full it is, sour breath
it could have worms in it, i am guessing worms if it was grassy looking poop, and they dont have access to grass
https://www.backyardchickens.com/a/impacted-slow-and-sour-crops-prevention-and-treatments
Capillaria spp. $$. Hairworms. Crop, esophagus, small...