I added boiling water to calcium pills to mush-ify, then stirred in oatmeal. The hens loved it. I hope it helps the eggshell quality. My hens just don't touch oyster shell.
Today I think I lost 3 eggs..... Eaten by the chickens! Four hens & a rooster had wet sticky beaks and I found 3 areas where the shavings were egg-y. I only got 1 orp egg (which was still warm in the nest) and 2 tiny bantam eggs. Part of it could be my busy schedule. I clean & feed before 8am and then haven't been able to go back out until 3pm.
The bantams don't seem to have the issue in their coop. We have a couple broody hens. They steal all the eggs and sit on them. They won't let any other hens near those eggs.