FINCHforum

Started out with 4 eggs.....two hatched and now don't see the other eggs? What happened to them?

Most often one or another parent will eat the egg -shell and all. My guess is that this may reflect some calcium deficiency in the hen.
Each egg shell has the calcium said to be equivalent to 10% of the hen's total body calcium. So she uses a lot of her calcium to make the egg shells.

When breeding, make sure she has access to abundant calcium. Chicks also need calcium to grow good bones. I use a mix of crushed chicken eggshells and oyster shell pulverized to something close to a coarse powder in an old coffee bean mill.

Yes, I do provide crushed egg shell and the oyster shell, which is why I was surprised to see them gone........may need to put in various places instead of in one area if the aviary.

Dbearden

I was given a tip of shaving the cuttlebone over their food. I found a half eaten egg in my societies nest, and started adding more cuttlebone/eggshells. The other two infertile eggs I found at the bottom of the cage, uneaten.

Remnant bits of cuttle bone are also useful to pulverize along with the shells. Or it can simply be scraped into edible bits with a kitchen grater.

I put a half teaspoon or more of the shell/oyster grounds right on top of each pair's normal seed in the feed bowl each day. This way they don't have to look for it.