So i had a hen abandon her eggs, but i had another hen sitting on nothing. I gave them to her. Its been a few days so i wanted to crack one open and see if there was even anything in them. When i cracked it open there was a fully developed chick It was moving so im pretty sure they are alive still. My question is how long until they will be hatching? They had not yet eaten the yolk in the eggs but the chick was completely developed, hard beak, scaley legs everything. This isn't really an emergency, but im dying to know!