Went to close up the coop last night and found a soft egg that had been eaten. All that was left was the tore up shell. I was out most the day with them, and checked for eggs shortly before I shut up the coop. It's my first soft shell. They are on fermented feed, plenty of oyster shell and kitchen scraps. I have 24 buff orpingtons. They about 24 weeks. What do I need to do to keep this from becoming a bad habit!?!?