Approximately three days before the chicken is about to hatch, the egg is being put on a special vaccine machine. (The eggs are displayed there as on the trays found in the store) the round edge is faced up, and the narrow edge is faced down. From the top, toward every egg is matched a needle to be injected for each and every egg separately. The needles come down, and with the point it penetrates the shell of the egg, and the soft skin from inside as well, and the injection is been given.
It is important to know the position of the bird in the egg. The chick sits on the pointy edge of the egg, and the head is facing toward the round edge. The chick is surrounded by the inside skin of the egg, filling up the entire egg, on the top, there is a small space between the shell and the inside skin, where the needle is to be penetrated.
Since the chicks and the eggs vary in size, and also, the eggs are not positioned in the exact same position, it is very common that needle penetrates the neck of the chick. The eggs are also very commonly misplaced, meaning upside down, the pointy edge facing up. In this position the needle is being penetrated in the chick directly as blood is coming out at the point of the injection.
The same procedure is applicable to the organic chickens.
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