My other chickens don't look like her. She just recently started looking the way she does. I haven't changed what they eat. They are all free range chickens. My camera is broke, so I'm not able to take pictures of her. She's missing feathers around her vent and its like her butt is sticking out. Some gross stuff is dripping down. Not so much today as yesterday. She's still laying eggs. I have her seperated right now and feel bad for her being able to see the other chickens running around. Can I let her still run around during the day? They all sleep in the same box and I'm afraid if she's sick she may pass it to the others.