You can collect eggs up to 10 days and store them, some do longer. The longer they are the less chance they have, but there is still a chance. There are threads on here with DIY incubators and lots of them. As for water poultry, a lot of people that hatch ducks/geese do mist their eggs during incubation. You'd be surprised how much birds do to control the heat and humidity that reaches the eggs. It's not as obvious to us, but when I started incubating I had the more experienced hatchers point out things that the birds do that I'd never thought about. It is fascinating. Worth a google too.
Do you think there could be an issue with the doghouse being too humid? Should I make air holes?
I'm also wondering if the geese are getting spooked at night. If a coon or anything walks by, they hit the water. Maybe there is too much going on to ever sit on a nest for very long.
from my childhood, so a few years back.
They would not pay a LOT of attention until they had a big batch of eggs (12 or so) as long as she is laying, I would say she is probably ok.
When she decides to go broody she will.
My guess would be soon if she has 12 eggs,
maybe mark or number them so you know older from newer (if you have not already)
That's a good idea about marking them. I wish I had thought of that before I had 20 of them lol
When they go broody, how hard will they fight to stay on the nest?