How do you know when the chicken eggs spoil?

Answer 1

One way I know how to tell whether an egg is spoiled or not, is the "water test". You need to have a container and fill it with water. Big container if you want to test more eggs, small (like a drinking glass), if you want to test just one or two.

Drop the eggs carefully into the water filled container. Fresh eggs sink to the bottom and lay on the bottom horizontally. Eggs that are not in complete contact with the bottom of the container, are fine. Eggs, that are standing vertically with one end still touching the bottom, are OK, although I would advise to use these for baking or so, not for eating directly as in scrambled, soft boiled and the like. Eggs, that are floating off the bottom or even float to the surface of the water: throw them out!