Here are the details. I've put them into days because she has exhibited a lot of symptoms and they are different on different days. Orpington mix hen, not sure age (definitely older than 2 years), not sure when she last laid. I've had her 1.5 years and got her as an adult with three other hens who are not exhibiting any symptoms. DAY ONE - Found her on her perch in the coop, not getting down - uncharacteristic. Her comb was very blue-ish / purple on the edges. Something seemed wrong. Brought her in. - Seemed confused. Inspected her and discovered a hard lump on her chest. Thought it was an impacted crop. Gave her oil. Then realized that it was just her breastbone and she was severely underweight. Very fluffed up, so I didn't realize. - Inspected her vent - somewhat messy. Potentially some mite or lice eggs around vent but not many. Some dried blood. Treated with Ivermectin between shoulder blades. Vent seemed swollen and was moving a lot. Gave her a long soak in hot water with epson salts. - Realized after her bath that she seemed really confused. Like a chicken that you woke up in the middle of the night. She did not respond to movement and her eyes stayed dilated even in bright light but otherwise seemed bright and healthy. - Gave her a second half hour bath, thinking being egg bound was a possibility. - She drank a little in the bathtub but would not eat or drink on her own. I did not force feed. - Had a solid poop in the bathtub, but it contained a lot of white. Had liquid poop the rest of the day. - Early in the day, she would not stand up. Mid way through the day, she would not lay down. DAY TWO - Seemed to be alert but still not eating or responding to visual stimulus. - Comb still purplish. - Would not eat or drink. Force fed her water in the late afternoon (after finally realizing something was really, really wrong.) She ate a few seeds with coaxing but didn't understand where anything was. - Could stand or sit fine. - Poops were liquid and yellowish or greenish. - Eyes wincing with pain. DAY THREE (TODAY) - Unable to stand for long without being wobbly and sitting down. She sits to one side and her tail droops to the that side (see photo.) - Poops are liquid and greenish. I've read that this can indicate starvation, which makes sense. Her last poop contained more white in it (see photo.) - Force feeding water with antibiotics and a pureed mix of raw egg, cat food and vitamins. - Still cannot seem to see but pupil is now constricting in bright light. - Eyes still wincing with pain. - Her comb no longer purplish in the late afternoon. Poop, day two Poop, day three (most recent) Today - she lays to the side with her tail to side. Her face today, showing her eye a bit more constricted in the light. The wetness on her chest is from feeding her. My internet searches aren't telling me anything concrete and neither is this forum. She has so many symptoms that it's almost impossible to search. Suspected problems: stroke, Marek's, egg yolk peritonitis. Her blindness isn't an issue - I'm prepared to care for a blind hen long term but obviously there is something else at play. And ideas or other questions to help me narrow it down would be great.