My hen Pearl is one of my older girls, 4 yrs old. I noticed two days ago that she was losing feathers and thought she was molting. Nothing else unusual....today I do go out and she's sitting in the coop with labored breathing. I pick her up to check her out and her feathers were falling out every place I touched. She can't stand and has been just laying in the shade all day. She did drink a tiny bit of water but other than that nothing. Does anyone have any idea of what could be wrong??