I have several slightly more than one year-old Buff Orpington hens. I noticed some weeks ago that a couple of them have earlobes that are turning from red to white. I tried "cleaning" them but it wasn't a case of them being dirty or coated with dead skin cells. I don't see any evidence of bugs. I keep the coop clean. The girls free range 14 hours a day and have access to organic layer pellets. They do sneak into the turkey pen and eat their non-organic, non-medicated feed, but I notice the earlobes changing before they had access to the turkeys. Not all the hens have this problem, some of them have bright fire-engine red earlobes, wattles, and combs. They have been laying regularly since they began, last October. (We're getting 4 or 5 eggs a day from seven hens, even with temps hitting 100+ all week. So far no sign of molting. The two that went broody and raised chicks still have nice red lobes. Any explanation? Is this "bleaching" due to egg laying?