For one, captive bred corn snakes no longer have the same instincts to feed that wild ones do. Many will only eat a specific kind of prey (mice). Some will even starve themselves to death when there is no availability of that prey item. True, some snakes will only accept live mice rather than prekilled, but the instinct is still strong for rodent prey.
Second, it can be very unhealthy and even dangerous to try and feed eggs to a corn snake. The snakes that do readily eat eggs have a specific tooth like structure in the back of their throats to break open the egg as it is being swallowed. The shell itself cannot be digested. So now you have two problems. The corn snake cannot break open the shell to get to what is inside and may become blocked by trying to pass a complete shell. The other major problem is that like I said, shells are not digestable. Even if you managed to crack open the egg before giving it to the snake it would have to regurgitate the broken pieces of shell. Regurgitation is not something that you want to purposely cause a corn snake to do.
Go to the Reptiles Magazine website. About two or three issues ago there was an article on egg eating snakes and how they are specifically made to eat such items. It also explains how it is extremely difficult and unhealthy to give eggs to any other species.
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