My immature non laying 9 month old RIR hen was found laying on her side in a pile of her poo. She couldn't stand at all and tipped head down immediately. Today she can stand but walking like a drunken sailor then falls over on her side. She eats like a trooper. Her poo seems normal. I did find mites around her tail. She is sleepy and I have to give her water. I am giving her feed with egg oatmeal and yogurt. I wormed her in the water. She has full head and neck control. Is very chatty and more determined to walk today than yesterday. What is wrong with my girl? What can I do for her?