I don't know if they is anything wrong but ... I have 3 Wh Leghorns, 26 weeks old, that just started laying. Just since they started, I noticed that 2 of them have a small bald patch on their necks, right under the left earlobe. On one of them the patch is bigger - maybe about the size of a half dollar. Its got very clean edges - very smooth unfeathered skin giving way cleanly to normal feathers. There's no sign of parasites that I can see, and no sign of injury. I haven't seen any signs of fighthing, and they are all acting normally. Any ideas what it could be, and if it's something to worry about? They wouldn't be moulting in their first year, would they?