For a few weeks I have been noticing one of my biggest chickens has been just lying in the same spot in her coop, she won't move at all and she is not laying any eggs. When I pick her up and place her outside of the coop on the ground but she didn't move at all when I put her on the ground she didn't even move her legs so she just payed on the ground again. He legs can move when I hold her they grab on my arm but when I place her somewhere she never stands up or moves, I looked at her stomach and she has no feathers on her stomach anymore but her skin dosnt seem to be irritated in any way. She still eats and drinks when I put food and water in front of her. What are you thoughts is she hurt or sick??