Hello everyone, I have 4 chickens that are about 27-29 weeks old. Two began laying a couple months ago, producing about 4-5 eggs a week/each. My other two have not started yet. About a week and a half ago one of my laying chickens popped out a shell-less egg, not a rubbery egg, a completely shell-less one. Almost like it was just a sack with a yoke. She seemed to be acting fine and I didn't think too much of it. A couple days later I found another shell-less egg hanging from her vent, which I removed. Despite this she appears to be acting completely normal...pooping fine, eating, drinking water, running around. I've had no eggs from her for a week now, while my other producing hen has layed almost every day. I've upped their calcium intake, but that's about it. On another note, I live in Minnesota, and that days have gotten very short. We also have had a big temperature drop in the last week. I'm assuming this has stressed out the birds. Has anyone else had this happen to them? I'm guessing there are no bound eggs in her as she seems to be acting just like the other birds. I'm just confused as she used to lay eggs like clockwork! Any suggestions on what to do or just cross my fingers? Thanks!