Hello! I'm quite new to pigeons and I recently got a female Voorberg Sheild Cropper pigeon, she's an indoor pigeon and I've been noticing that she has pulled out feathers from her neck or moreso balding in that area. It's mainly around the upper middle and on the sides of her neck, I noticed she gets balding around the upper middle when she lays/sleeps since she has her neck all puffed out but when I got her out this morning it seemed like the sides of her neck were bald/had pulled out feathers. Lastnight she seemed totally fine. I don't know if this is medical related, how she's been feeling or what. I fear that I may be doing something wrong. Any help?