I am new to raising chickens so forgive me naivety please. One of my hens has been very tired the past couple days...has a hard time holding her body up. Falls over easily. Eyes wanting to shut. Green watery poop. She is around 5-6 months. Any ideas or suggestions on how to help her? I would like to treat naturally. I gave her some yogurt mixed with her food. She is eating and drinking. Have her isolated in warm basement.