For what its worth
I would like to add to what Bitsy was saying, I have had hatchlings go for
4, 5, 6 months without feeding and this is from pipping and not having fed after hatching ( living on yoke ). I must admit that when it gets to 6 months I force feed, this is not ideal because at this stage the babies are pretty weak and poor in condition, this has actually caused me to lose a few.
Force feeding must be used as a last resort, but never ever give up.
Ciao