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How to prevent chicken embryos from dying before pecking the shell

2020-11-27

During the incubation of the chicken, if the eggshell is too hard or the tip of the mouth is far away from the eggshell, the normal embryonic chicken will be smothered before pecking the shell. So, how to prevent this kind of phenomenon from happening?

1. Turn the eggs. The first 10 days of incubation is the critical period for blastoderm positioning. In order to make the embryo's eye points develop along the side of the shell and facilitate the smooth pecking of the shell when the shell comes out, pay attention to keeping the big head up during the egg turning operation, and the turning angle is 90 degrees. It is advisable to always keep the egg head up.
 
Second, according to the egg. After 10 days of incubation, the eggs are photographed. If you find that the seed embryos have no eye points, but only clear blood vessels around the air chambers, it indicates that the heads of these seed embryos are generally located in the center of the air chamber or bent to the abdomen when they emerge. The shelling rate is extremely low. These embryos should be marked on the eggshell so that the chicks can be rescued in time when they emerge.
 
3. Midwifery before the shell. Generally, chicken embryos with normal development and correct embryo position are more concentrated, the time is more consistent, and there is an obvious peak of hatching. Pecking shells are seen after 19 days, and the chicks are usually hatched at the same time in 20 days. Generally, a large number of chicks hatch within 14 to 18 hours of 21 days. The peak of hatching is obvious, and almost all chicks emerge after 21 days. Therefore, the optimal time for midwifery is 1 to 2 hours during the peak period of hatching, that is, the first 5 to 6 hours before the full 21 days. Premature delivery will affect the normal hatching and stillbirths and weak chicks due to heavy hemorrhage, or due to premature water evaporation, the young chicks will be sticky and difficult to give birth; late delivery will cause a large number of chicken embryos with incorrect fetal position Suffocated in the shell. When giving birth, gently peel off the upper half of the eggshell of the embryonic chicken head, and gently pull out the head that is bent over the abdomen or under the wings. Pay attention to remove the mucus and dirt around the nostrils of the embryo body to avoid obstructing breathing. Because the breeding eggs are peeled, the water evaporates greatly, and the humidity of the hatching room can be increased to more than 90%. The bonded chicken embryo can be moistened with warm water, and then use scissors and tweezers to gently cut or pick open the mucosal dry scab, so that it slowly spreads its limbs, and allows it to break the umbilical cord and peel it off. When peeling the shell, you should be careful not to break the large blood vessels on the surface of the fetal membrane that are not fully contracted, so as to avoid excessive blood loss of the chicken embryo and death of the belly button blood.


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