How does a chick break out of its shell?

[After 21 days of incubation, the eggshell becomes less sticky and more fragile than the original fresh egg due to the constant turning of the hen. Furthermore, there is a small tip on the chick's beak. layer of protective film]. The chick only needs to peck it with its natural sharp beak and support the body, and then it can easily come into the world. After hatching, the protective film on the chick's mouth needs to be removed, and it can go to the ground to look for food after feeding some strong tea leaves. It is best to feed brown rice first.