I wait until the first baby pips it's egg. Then I cut a 1-2 inch slit in each egg. The next day I usually make the cut larger with a flap if they haven't come out yet.

I always wait until the first pip but I cut it large enough to get a good look inside for morph and any problems. Like a wrapped umbilicus.

Some people cut way earlier than first pip which I never do. In those cases they generally cut a smaller hole so it doesn't dry out. You often need to add distiller water daily to each egg if you cut too early. There really is no reason to cut early though. In every average clutch, there will always be at least one that pips it's own egg.


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*Factoid: "There are no such things as Hogg Island or Columbian boas"