I'm following this because I suspect an egg-eating problem with our flock too. I have 6 pullets (9 months old). They've been laying like champs! About 5 days ago, I saw a broken egg. It looked like most of the shell and contents were still in the nesting box, and since it was the first time I saw this, I chalked it up to being accidentally stepped on or something. I have a Lt. Brahma who's been known to squeeze herself in with 2 other birds in a 12" nesting box, so it seemed plausible.
Fast forward to today and I just saw another broken egg. This time, I didn't see much of the shell and only a small amount of the white and yolk. It was a gross, sticky mess and I had to wash my other intact eggs and fridge them (I hate when I can't have them out on my counter looking pretty haha).
We have ceramic eggs in place already. Plenty of nesting boxes (which clearly doesn't matter). They're on a 16% layer feed. I don't offer additional grit; they've always just eaten bits of naturally-occurring grit from the dirt in their run.
Questions:
1.) Could the addition of pine wood pellets and straw that I added to the run be making it harder for them to get their usual grit?
2.) Should I offer crushed oyster shells or would egg shells be better?
3.) Has anyone used a removable, washable nesting pad? I'm not keen on emptying and cleaning the nesting boxes of their straw each time this happens. I'd prefer to be able to rinse something and put it back.
4.) Could this be boredom-related? I haven't been giving them any flock block, suet cake type things lately. Just occasional veggie scraps and scratch 1-2x/week.