Just got back from being gone for 6 days to find more than a few feathers in the coop. I had the 7 girls (14 wks old today) confined to the coop/run while I was gone (a neighbor was opening/closing the pop door morning/night). Usually there are maybe two or three feathers in the coop, but this morning I could see maybe 15 to 20. Would a molt be possible at this age? Seems kind of strange for them to molt during the summer. Couldn't see any noticeable bald patches on any of them, so I'm a bit puzzled where they might be coming from. Could this be a protein or other mineral deficiency?