If you have questionable eggs, then just boil them and fed them back to your chickens. Crush shells and all. Good protein,,,,, back to chickens. 
I have done it this way. Times I found a clutch of eggs that a hen has been secretly trying to hatch. I gather all and cook and serve back to them.

I have done it this way. Times I found a clutch of eggs that a hen has been secretly trying to hatch. I gather all and cook and serve back to them.