I had one that couldn't get up. I think he had a very long, difficult hatch. He couldn't stand without help. He also "clicked" when he took a breath. I think he got some fluid in his lungs. It took two days before he finally could stand and walk on his own. There was a point where I thought he wouldn't walk at all. I had to make a nest and keep him upright in a little tuperware container so the other chicks wouldn't peck him. By day 3 he wanted to to be with the other chicks and held his own. Before he was eating and drinking on his own I fed him electrolytes from a syringe. After all that effort, the grew up to be a cockerel of course! He's still smaller than the other chicks but is now looking normal for his age. Best of luck with yours! I hope she's just tired out.
