Good to know about the wax... given that I have plenty of beeswax I think I am going to use that. I did save one egg that had just a hairline so I will treat it that way, the others were weepy/seepy so I tossed those. I did notice the broken ones were pretty thin. Hopefully I will get a few from this batch! Not ideal conditions but worth a try. We've been having trouble with thin eggs from one of our layers too- until she stopped laying to molt. I hope when she starts up again her eggs will be nice and thick.
