I give my backwards chicks a full 24 hours before I peel any shell beyond a small hole... I think they need that much time to absorb yolk and veins. Don't worry, they are not too hard to help... I have had several in my last few hatches.Ok, so the one that piped this morning is starting to make a bigger hole and lots of chirping!!! yay!!!! but around 8 pm I noticed another egg had piped but at the wrong end!! it made a good size hole and i have read enough to know to leave it for atleast 12 - 24 hours..... im really nervous, never have had to deal with this with chicken eggs!!