Several of my pullets seem to have quite a lot of pin feathers among their hackle feathers. My silver laced polish also has a lot of them in her crest. The feathers in question are not very visible, but you can sure feel them when you're giving them a little neck scratch. I'm not sure if they just have more adult plumage growing in, or if they need some sort of supplementation in their diet. They currently get black oil sunflower seeds regularly as a treat, as well as fruit and vegetable scraps, in addition to their regular feed. Is there something specific I should do to help out their plumage? Thanks!