Goose girl with the females lay that many eggs the oyster shell is great but I also believe that they need more calcium as I was talking on here about. I found my girls out picking up the nuts that fall from our trees and that is what gave me the idea of putting shelled nuts in their feed. Then found out it has calcium in the nuts which is good for the girls to replace what they lose from their bones from laying the eggs. So that is when I tried the mixed shelled nuts for them. It is a bird feed mixture of just the nuts not other bird seed in there. This also helps with the soft shell eggs.I keep taking her eggs (so yummy!), leaving only a golf ball in her nest, so that's probably why she doesn't go broody. It's wet, cold, and windy here, so I don't want to risk her starting to molt.
If she's still laying after the holidays, I'm going to call my vets and ask if they know whether it's harmful in any way for a goose to keep laying. They're great with birds of all kinds.
I give her crushed oyster shell and she eats a lot of it.