We noticed this last night on our 3wk old Gold Laced Wyandotte. It’s crusty to the touch and swells around to the side of her neck. When i feel it there is swelling underneath the scabby dried area, you can roll the area of her neck between your fingers but it doesn’t seem to hurt her. Her crop,vent are, poop, activity level and eating are all normal. None of the other birds have this. We are very new to chicken keeping and don’t know what to do. HELP!