Please help - anyone have any guesses on this mystery illness?

[Punkybrewster]

Its heart breaking. I know.

 

[HoustonWeHaveAChicken]

Its heart breaking. I know.

it really is!

Flock friends, I need one more piece of advice. The adult bird is very close to the end; she’s quite sick and has been sitting under the coop all day. I don’t think she will make it through the night. Should I move her into the coop tonight, or leave her out in the spot she’s chosen? (She is completely safe; my birds are in a fully enclosed and predator-proof run - she is sitting in a corner with three Plywood walls surrounding her)