I have a chicken named Frank that’s feathers grew in fully sheathed. At around 3 or 4 weeks old I noticed the chicks head slouching. I separated it from the flock and babied it back to health. Eventually it was able to raise its head again but took a very long time to grow feathers. The feathers that did come in are fully sheathed. Do you think it’s just because of the neck issues, she can’t reach to get the sheath off or??? Any help appreciated. At 14 weeks old I have it separated from the flock but I can’t do that forever.