Thank you for the original post and the updates you made regarding the eventual sad outcome. I have a mixed/unknown breed hen who is at least 8+? years old and recently seemed to not groom properly, stayed dirty and damp as if she just quit shaking off the dust after a bath. I honestly don't know what it looks like when a bird dies of old age so I can't make any compairison or educated judgement. Four nights ago she started only climbing to a very low roost at night rather than the highest she usually occupies, she has no signs of parasites or injuries and no nasal goo. Last night she sat on the ground so I scooped her into a tub and brought her into the house. She died an hour ago. I hope it was just old age that got her. How do I know? What is typical?