Question

My birds keep eating their own eggs

Answer

There are two common reasons why birds eat their own eggs:

1) it is 'just' a bad habit.

2) they need calcium.

If it is just a bad habit, there's not much you can do except maybe try and remove the nest for a few weeks and try again later.

If the birds need calcium - try feeding them some. Take a look at the Basic Care page to see how.

You are welcome to ask again: