I noticed one of my hens standing lethargically today, leaking poop. I gave her a bath and let her sit outside of the run in the shade, since today was a hot day. She wouldn't eat or drink. I felt her crop and it felt hard, almost like there was a bone running down it. It's strangely not the entire crop, but just one solid square-ish piece going up and down. I haven't found anything online about crops being that shape. I used an eyedropper to give her some water, mixed with an electrolyte powder made for chickens. She had a hard time staying awake, and her eyes were bloodshot when they did open. She didn't move from where we set her. After about an hour, she lightly fell over and started sleeping on her side. I put her in a cage inside my house, with hay for comfort, plus food and water bowls (though she won't eat or drink). She's just laying awkwardly and breathing heavily with her eyes closed. I don't know what to do. Please help me, I don't want to lose another one of my girls.