How To Tell If Eggs Are Good?
The key to identifying fresh and rotten eggs lies in the appearance of the egg. A sour-smelling egg has a low oxygen level and can easily be identified by its shell, and it also floats and has a swishing sound. The egg white of a fresh egg will be runny and discolored, and the sound and appearance of the egg can also help you determine its freshness.
The best way to know if an egg is still fresh is to check the date code on the package.