Hi, I've noticed that my Plymouth rock is losing feathers around her neck. I searched up chicken bullying (as there are two other hens that live with her) and I saw that it typically meant pulling tail feathers out first. Because it was her neck feathers going, and she still has all her tail feathers, I thought it might not be bullying, but she might be scratching too hard around her neck. Is this common? Any way I can help her out? She's only a couple of years old, and I have never seen the other hens bully her.