I have 8 12ish week old pullets. Right now they are fed Purina Flockraiser and occasional scratch and garden greens as treats. Lately there seems to be a lot of feathers laying around in the run...I've raised them as day old chicks and they've never been by other birds, and I've checked them for mites..none of them. They have a good diet. I know that they can't possibly molting at 12 weeks already, and there isn't any feather picking. Is it just a growing bigger type of a thing? Any ideas would be great. Thanks in advance!