I cleaned the coop and treated all the chickens, gave everybody lots of worms, and even was cooking eggs for them. This chicken was out side basically freezing to death so I brought her in three weeks ago, I’ve been feeding her grub worms I’ve been cooking her eggs, and she still won’t go back her feathers. Any ideas? Also her skin color is very yellowish kind of like jaundice. When I brought her in my house three weeks ago I thought she was actually going to die. She eats good, drinks good. I am absolutely clueless at this point.My silver Wyndotte molted along with her sister in October. I’m not sure which one molted first but The other chicken grew her feathers back within a few weeks. I thought maybe it could be mites or lice