Click here and find out what determines the color of the hens’ eggs.
You may have noticed that the chickens have eggs with different colored shells, right? Some people believe that brown-colored eggs are more nutritious than white-shelled eggs. Is this information true?
The eggshell is rich in calcium carbonate and acts as a chamber for the development of the embryo . Although many people believe that their color is related to the animal’s diet, this is not quite true.
The pigments that color the shells, hemoglobin or bilirubin, are released on the walls of the oviduct. The color of the bark , which can be white, brown, red, green and even blue, is related to the chicken breed . Mediterranean chickens, like Leghorn, lay white eggs; American and Asian chickens, like New Hampshire, lay eggs in shades of brown. It is noticed, therefore, that this characteristic is genetically determined and there is no way that food can have an effect on it.
Many people say that the color of the feathers is directly related to the color of the egg shells. However, sometimes there are white animals with dark colored eggs and vice versa. It is worth noting that some breeds of chicken are able to lay eggs with different shell colors.
The color of the egg shells is a genetically determined characteristic
Some people claim that by looking at the chickens’ ear disc, it is possible to get an idea of what the color of the egg will be. Chickens with a white disc lay white eggs, and those with a reddish ear disc lay red-shelled eggs. However, this rule is not always valid.
It is important to note that, regardless of the color of the shell, eggs have basically the same nutritional value. Therefore, there is no difference in the acquisition of one or the other egg, only with regard to price.
Unlike the color of the shell, the color of the yolk is directly related to the hen’s food. Chickens that eat more corn, for example, have eggs with a reddish yolk. This is due to depositions of carotenoids (reddish-colored pigments) from the ingested foods.
It is for this reason that the egg yolks of free-range chickens are less reddish than those of free-range chickens. Free-range chickens are usually fed products that contain little nutrients that provide pigments.