Hey guys, I need some help figuring out what's wrong with my 20 week old RIR chicken. When I put the girls up for the evening she didn't come back to the coop. I found her in the barn laying in a corner. She had runny yellow poop beside her and was very lethargic. She keeps her eyes closed. She can stand and open her eyes but she only did either when I moved her to a small pen. My first hens, not sure what to do. Any help would be greatly appreciated!! Thanks!