There seems to be quite a fear amongst many here on BYC (especially newbies) about not feeding eggs or eggshells to your chickens because it might turn them into egg eaters. But in the thousands of posts I have read, I have yet to read one in which someone said, "Yes, I fed eggs/eggshells to my birds and they started eating the eggs they laid."
I've read LOTS (hundreds?) of posts of folks who feed eggs/shells and have no issues. We do this all the time and have never had an issue. We had a couple birds who consistently laid thin shelled eggs, which often broke, and they would eat those up. Which was great...they cleaned up the mess for us!