I didn't know who the culprit was or what prompted the destructive behavior. I found it a small consolation that it was just the egg's outer shell and the inner content was not being eaten.
Purging the flock of four was not an option but I did know the outcome would be grim unless I could come up with a plan.
First, I added a golf ball to the two ceramic eggs in the nesting box since pecking a hard object might deter further pecking. Later, I removed the golf ball and the fake eggs, maybe the nesting box was too crowded.
I made sure to offer plenty of fresh free-choice Oyster Shell calcium supplements.
The Girls also seemed to lay between the hours of 10am and 3pm, and they took Sundays off. Go figure.
I also learned that if I wasn't able to gather the eggs in a timely manner, I would find an egg with a hole. It was a sad day when I had to throw away three pecked upon eggs. It didn't take long before I got into the routine of checking the coop at 10am, 12noon, and 2pm.
The last pecked egg had been recorded on May 8th so for the last couple of weeks I've cut my coop visits down to once a day. The noon visit often reveals - one, two, and sometimes three - beautifully intact eggs. I'm on the last page of the Chicken Notebook and I won't be starting a new notebook.
The measure of success?
just one egg at a time.