Well, we had a 100% hatch from my eggs thanks to my 6 yr old son. There was one chick who was having trouble after three days of trying to get out of the shell. While I was putting the dried off chicks in the brooder he took the egg which was partially zipping and carefully peeled away at the shell. Soon he had it out and we put it back in the bator to dry and today it's running all over I was going to cull it because I thought something was wrong with it So my son feels pretty proud he was able to save a life! He did a great job too So careful!