I believe they are called angel feathers seen them before in ameraucanas most people breed away from it but I don’t think there’s anything in standards about it.
Either move the pen somewhere else or just kill them when you see them all you can really do. People that say don’t kill them have never had a snake problem. I’ve had years where I killed upwards of 20-30 out of one of my pens alone. Once they find the eggs, chicks or small bantams there just...