Also known as Casher, it is about the classification, according to Jewish religious beliefs, of the foods that can be eaten, which are sacred and which are not. These are the most important principles within the Jewish community, who are subject to strict rules of worship, which include kosher. The regulation was extracted from Leviticus and, today, foods as important as sausages or milk have labels that qualify them as suitable for the practicing population of this religion to consume them.
For each type of animal there is a different classification. For common terrestrials, the Torah (a Jewish religious figure who in ancient times described the animals that should be consumed) declares that only those with cloven hooves and instincts that tell them to ruminate are the ones that can be eaten, others cannot. Fish that have fins and scales are the only ones that can be eaten and the only birds that cannot be eaten are carrion; Besides these animals, rodents and reptiles are completely prohibited for the practicing community. It should be noted that the aforementioned characteristics must be present at the same time in the animal, as no product derived from these can be ingested.
The shechita is a ritual in which the animals are sacrificed so that they do not suffer, making a deep and clean cut in the throat, using a sharp knife. Most of the time, Jews are forbidden to consume the blood of animals, so it must go through a cleansing process, so that no remnant is left in the body. Added to this, the corpse must be blessed so that it can be ingested. You cannot eat the fat around the organs or the sciatic nerve.