My black sexlink has one wing that she seems to be holding lower than the other and she isn't using it to flap. I held her yesterday and gave it a bit of a prodding, which caused no reaction from her, so I don't think it is broken. Can chickens sprain their wings or have some other reason that they might not use a wing? Her "good wing" was clipped, so I wonder if that has caused her to stop using the other one for some reason. It's very puzzling.