1. Check whether the eggs are shiny. The shells of fresh eggs are brightly colored and have a shiny surface.

2. Listen to whether the egg shakes. Put the egg to your ear and shake it gently. If the egg shakes in the shell, it means it has been aged for a long time and may have gone bad.

3. Weigh the eggs. Eggs aged longer are lighter.

4. Observe the surface of eggs. Cage eggs generally have wire marks.

Because free-range chickens eat some insects and other raw materials, the protein elasticity of free-range eggs is relatively good, but the hygienic indicators are poor. If you buy damaged free-range eggs, it is recommended not to eat them.

Extended information:

The main difference between local eggs and ordinary eggs is the taste. Since local chickens eat some insects, the concentration of fatty acids in local eggs will be higher and the fragrance will be stronger. However, its basic nutrients are protein, fat, vitamins and minerals, and there is no essential difference from the foreign eggs produced in farms.

There is a common misunderstanding among consumers when purchasing free-range eggs, that is, they think that free-range eggs have larger yolks and darker colors than ordinary eggs. This view is not comprehensive.

If the chicken feed contains ingredients with high pigment content such as red pepper, purple cabbage, etc., the egg yolk will be reddish; if it contains alfalfa powder, pine needle powder and other green plants with high lutein content or yellow corn, The egg yolk will be yellow; if white corn, wheat or rice is the main ingredient, the egg yolk will be white. This has to do with the food the chickens are fed.

Baidu Encyclopedia - Local Eggs

People's Daily Online - What is the difference between local eggs and ordinary eggs in terms of taste? The nutritional content is almost the same