Hello chicken experts, I recently received my first batch of chicks in late May which consisted of a variety of breeds from the hatchery. A few did not make it past a week and it was difficult to tell which breed was which at first but I think I now have them all figured out, except for 1 which is confusing me a bit. It has been the only all white bird all along (except the broilers wihich there is no mistaking at this point), so by process of elimination based on the breeds that I ordered I had assumed early that this all white chick had to be my Pearl White Leghorn. But now it is developing a brown neck which is throwing me off. I have attached a pic. Any feedback would be appreciated, thanks!