When mine first started laying evey day they changed. One was round as a ball then got longer and darker in color. It took a week or more to get semi-normalized.
I just put all mine that had been layed for the last week in the incubator.
But I do know I have 10 hens and pretty much every day I...
Why do you need to Know?
What makes you think I can figureout if my eggs are coming from the same hen if you cann't. If your giving them good food, light and a clean home they will all lay soon. Every day most likely with out fail.