Seeing the picture that you attached, your hen is definitely sick! When a chicken is ruffled, standing alone, tail and wings drooped, head down and eyes closed, she is quite sick. Chickens tend to hide illnesses as long as possible, so by the time you see these symptoms, they are well into advanced stages of disease. If you can, you might want to take her to an avian vet, as there are a number of illnesses that these symptoms are associated with. If you are not able to take her to an avian vet, perhaps you could get a fecal sample and take it to any vet for analysis. If it is coccidiosis, try to treat her with Ivomec or some black walnut hull extract which you would give her twice a day. I wish you good luck with this, and hope your hen gets better with treatment.I have a Cinnamon Queen hen that has been “napping”. She doesn’t lay eggs, I’m not sure if it’s because she was malnourished when we got her or if she is older than the previous owners told us. I was told she was between 1.5 - 2 years old. I do see my other Rhode Island Red hens nap occasionally when doing their dust baths.
Do chickens nap?