Yes, its a safety hole, made to ensure the duckling doesn't run out of air after the internal pip, not much can go wrong if you do it in the right place and the right way. To make a safety hole, grab either a sterilized brad point drill bit or a sharp screw, position the screw directly over the air cell end, with light pressure twist back and forth until a hole is made, do not widen the hole further, as you risk premature drying out of the membrane which may result in shrink wrapping of the duckling, if the duckling doesn't progress after 24/36 hours or is less active you can widen the hole to the size of your pinkie, ducks are very slow hatchers and can sometimes take 72 hours to zip from the first EXternal pip.
Safety holes are very small, here is one I made last night.
This is a great link,
https://www.backyardchickens.com/articles/guide-to-assisted-hatching-for-all-poultry.72886/
Safety holes are very small, here is one I made last night.
This is a great link,
https://www.backyardchickens.com/articles/guide-to-assisted-hatching-for-all-poultry.72886/

