Internal pip over 24/48 hours

[Nikichick123]

I've got my last mascovey duck egg in the incubator day 37 (normal 35) and it's had an internal pip for at least 48 hours, no external pip. I don't necessarily hear any noise but I can see a lot of movement and when I whistle and tap at the egg I hear slight tapping inside. Should I make a little crack for it?

 

[SilverBirds]

You can drill a safety hole onto the large side of the egg. Make sure you candle before doing it though.