I have three hens (Barred Rock, Rhode Island Red, and Australorp) and just got my first two eggs this morning. Unfortunately, they were a disappointment. One was entirely crushed and the other looked like it had a pecking-hole in it and was soft shelled. I've just placed calcium in their run for them to eat as desired.
The BR had been squatting for three weeks now and the RIR and Australorp have been squatting for a week or so. The BR is two weeks older, so really they all started squatting at close to the same age. I know early laying can have irregular results. Is it possible for one chicken to lay two eggs in a single night at first or is it certain those eggs came from different hens?
I've had ceramic eggs in the nesting boxes for 2+ weeks now. Hopefully, they will soon get the idea that is where they belong and they won't be eating them.