i give my snakes eggs as a treat about 1ce every 3-4 months.
but never chicken eggs.
i find that chicken eggs have a high instances of salmonella plus they are too big.
if a chicken egg cracks while in the belly of your corn snake, there may be problems.
i feed mine quail eggs.
but mine will only eat them if there is something growing inside(not with just fertile yolk).
i place them in the incubator at 101 degrees then , 3 days before expeced to hatch, i feed them.