One of my Easter Eggers started to pull her feathers out. At first I thought she was molting, that was about 5-6 months ago. And now it's winter and she is still hasn't stop molting. She and my other Easter Egger haven't layed an egg for 6-7 months (and the other hasn't even layed); plus she also started to loss her tail around for vulva and it looks like she is pulling out her feather there. Is some wrong with them?