With the egg eater I mentioned separating last week, well after a week of her no longer pecking her own egg, I decided to put her back with the other girls as a final chance. Its been a week and not one cracked egg, idk why that would have changed her ways but so far so good. She's been laying quite well and her egg no longer has its signature peck mark on it. It's almost funny, I instinctively always look for it because her eggs go in my stash. Old habits die hard.