They molt several times the first year and have their big molt around 18 months. Mine just got over having mites and there were feathers everywhere. I thought they were pulling them out bc they were itchy, then someone suggested it was a molt... I didn't realize they molted before the 18 mo molt.. Then I remembered all the feathers we had blowing into the yard this summer. I got them feed w extra protein (feather fixer) and my leghorn appears to be filling in his feathers again.