I have 17 hens that are 23 weeks old and are just starting to lay. So far about 4 of them have started laying, one of those her first egg was soft shelled and I found it under the roost. I check every morning and evening under the roost to make sure another one hasn't laid a rubber egg (the chickens do not have access to underneath the roost, so whatever is laid there of an evening is there until I fish it out. This morning, however, I found three rubber eggs under the roost, in very close proximity to one another. What are the odds that three hens laid there first eggs in the middle of the night, in the same spot, and they were all soft shelled? Is the best theory that something spooked them in the night, causing them to lay? Is it possible for one chicken to lay 3 soft shelled eggs in one night? I know that is probably a stupid question. I guess my main question is, should this concern me?