I would try offering extra protein - this can be egg, fish, meat or providing her a 20% protein chick starter or all flock feed. Direct dose her with poultry vitamins 2-3 times a week as well.
I'm not sure what's causing the feather issue, but I would start with nutritional support and see what happens.
I’ve been giving her worms and feeding her eggs. She is in my house, because it has been a cold February here, sometimes getting around 29° At night I didn’t think about vitamins, thank you.
Yes, so confusing it was actually her first molt.
I always try to feed the girls extra protein when they’re molting, making a point to see that they are eating the worms/eggs. Or I should say making sure the others didn’t eat it all before they get some.
One reason I had to bring her in the house is because normally the chickens all nestle together to keep each other warm, heck they do it during the summer. But she kept herself separated, like knowing that she was sick and didn’t want to be picked up. So she was freezing to death.
Thank you for your suggestions, I really appreciate it
So today will make the fourth week that she’s been in the house, so she’s been getting lots of protein and just good food. Usually, after the initial molt, they should have their feathers back by the fourth week.