I am quite worried...i noticed a few weeks ago that one of my jap quail feathers were not looking healthy. I believe that she stopped laying eggs too a few days or week ago. Now the cage floor is full of feather and when i pick her up, i can pluck the feather off easily, mainly on her tummy. She is lethargic and not as usual. i have taken her out of the cage to isolate her, and she is way too quiet and not active as she normally is. what are your thought??