Yes, very carefully. Some people like to crack them open to see what went wrong, I personally don't. You can usually smell which are rotation from the outside, and can usually tell by candling. We are rural so ours get tossed out in the weeds far out in the field.
On day 23 under a broody hen. I generally get rid of them. You can try candling or opening some up. Since a few aren't that old yet I might wait until all pass that time frame.