Oh, no...so sorry to hear it. I know what a tough call it is on when to help, especially when you're new to incubation - and we have all been there.
I really prefer to have broody ducks hatch them because they are challenging to hatch successfully. That said, it can be done, but I think being...
@Farmer Maz , I forgot to mention that Muscovy eggs have unusually tough shells, so it can be very difficult for the ducklings to get out...hence my less-conservative stance on assisting, especially with these guys.
Sorry to hear 3 didn't make it. Not sure it will make you feel any better, but my first attempt at hatching Muscovy eggs was a total bust - they were shipped eggs, it was unusually cold, the Postal Service sent the package from a neighboring state (one of the reasons I bought them, thinking...
You're doing pretty well at 5 of 6 developing! I also raise Muscovies and hatch their eggs under broodies and in an incubator.
If you haven't already read this, it has a lot of helpful information: https://www.backyardchickens.com/a/incubating-and-hatching-muscovy-eggs. I don't use the...