Have you read this:well, I have 5 wiggling babies in lockdown on day 34. I hope they hatch. One is internally pipped, the others are not. I noticed the internal pip last night, so he has been internally pipped for almost 24 hours now. Are there others on the thread with incubating experience? How long does it take them to externally pip?
https://www.backyardchickens.com/a/incubating-and-hatching-muscovy-eggs
-Kathy