Hi! Just wanted to comment on the missing eggs.  Recently, I had a broody hen hatch out a batch of eggs. During this time, I added extra nest boxes to make up for the one she was using. Well, the hens took a liking to the new nest boxes and soon were laying most of the eggs in them.  After Mrs. Hen hatched her eggs and the peeps were pretty much part of the group, I removed the extra boxes to make more room. That's when I noticed the eggs came to a sudden drop.  For several weeks, the egg production went way down! I guess after awhile, the hens realized they lost their new condos and had to go back to the old nesting boxes. Took awhile till production was back to normal.  You may have an egg eater…and/or, you may have some disgruntled hens who miss the original setup. When I read your post I though about what happened with my hens. Just a thought but it might part of the problem. Good luck with your eggs!