It is called "rooster's" and "witch's" egg. When it appears in the chicken coop, there is not much good.
What does the appearance of such a "surprise" mean? Even in ancient times, people believed that this was not good. And they were partly right. In the beliefs of our ancestors, the egg always symbolized peace and well-being. It was believed that it was from him that life began and the universe arose. When the chickens began to "chop", it could mean lessons, an approaching illness or even a burned down hut!
If this happened on Good Friday, then in general, after Easter, the ancestors could invite a priest to consecrate the house, so that no dark force would become an obstacle in all matters.
Just as an egg is a symbol of a rich family, there was also such a sign: in a house where there is a pregnant girl, a hen brought a "witch's" egg - the child will not be born or will be born with such defects that no healer will be able to put him on his feet .
What does science say about it?
In reality, everything is not as scary as the signs describe. If you have young chicks that seem like yesterday they were yellow chicks, the reason is that their body has not yet fully formed and the reproductive system is not yet ready for offspring. Add more calcium to the feed and the situation will change later.
The reasons can be medical. For example, inflammation of the oviduct or salpingitis prevent the bird from forming a full-fledged offspring in the shell. If the chicken has inflammation, it can lead to small eggs without yolk or white. If you find a disease in your feathered pet, do not delay treatment, because diseases are quickly transmitted from one individual to another.