For future reference, once a chick starts zipping, and I mean starting a full zip, progressing an inch or so around the egg, they should complete the zip in about an hour. As long as they are still active and progressing, I may allow 2 hours, but if they stop for 15 minutes or more at a time, I break the cap loose (the whole end, like continuing the zip for them) then place it back in the incubator for them to kick out on their own.
They usually won’t start a real zip until they are very close to being ready to emerge. My lavender orpingtons were the worst at starting, then giving up. Many times they would miss cutting the membrane in spots. Once I started breaking the cap for them, I had a ton more survivors.
They usually won’t start a real zip until they are very close to being ready to emerge. My lavender orpingtons were the worst at starting, then giving up. Many times they would miss cutting the membrane in spots. Once I started breaking the cap for them, I had a ton more survivors.