My camera battery is dead and the charger has been MIA since we moved 2 months ago so I borrowed this picture from the 'Common Egg Quality Problems' page. It is the closest to the problem we are having. 1 hen out of 11 is laying eggs like this, but the discoloration and texture issue is just on the ends, often times the shell is so thin that its breaks at the end into the air space, but the membrane is in tact. We don't eat these eggs, just toss them back for the hens to eat, I figured it was just stress of moving, heat, cheap feed that we WERE using, etc and so I changed the feed to higher quality and let it be. Today my daughter came in and said that the spot was bigger, still on the end and and a bit softer (not shell-less soft) but soft enough that it was slightly misshapen. The Egg Problems article indicates cause as Stress in Flock, Change in lighting, or Bronchitis... My hens have a larger coop, 8 nesting boxes and a huge enclosed yard, plus they are free range on 6 acres (though they prefer my garden bed) during the day, and I haven't noticed any pecking within the flock, so I assume it isn't stress . Lighting shouldn't be an issue as its still summer That leaves Bronchitis, but it's been laying this way for several weeks (only had the flock a few months) and they all look like happy healthy hens to me. I have no idea which hen is laying this egg. Any advice? Do I just let it be? do I medicate the entire flock? I can't quarantine since I have no idea which hen it is. Second and probably related question, all the shells seem thinner than our old flock. Any ideas? I keep thinking that free range hens with good layer crumbles and corn should be good to go in diet.