The process of a chicken egg hatching involves pipping, when the chick breaks a small hole in the shell, and zipping, when the chick uses the hole to break out of the shell🐣🐥 Pipping; around day 21 of incubation, the chick uses its egg tooth to peck a small hole in the shell, called a pip hole. You might be able to see the tip of the chick's beak through the hole. The chick will then rest and breathe oxygen while absorbing the remaining yolk and finishing its development🐥🐣 #chickens #chicks