I've noticed this before on her but never rely put it in my head. I thought it was normal but I kept noticing it and well the pictures are bad but it's good enough because try getting her to stay still lol. I looked at another thread like this and mostly at night my flock pecks eachother because I guess it's the pecking order. I've never seen them peck her head for her to be bald and shes a boss type of hen so you peck her I'm pretty sure shell peck them back. She does sleep on the lower roost next to my one silkie and protects her from getting pecked so maybe that's the case. Ive seen no bugs (mites or lice) shes healthy overall. Any ideas?