Mishap eggs and pre-cracked??

[pigglywink]

Hi

I have an australop who has given me beautiful large eggs up until recently. The last two days it has laid eggs that look like they have cracked in the process of making the shell. One of them even looks like the yolk inside it too big for the shell and has stretched it out (pics attached).

Does anyone know what has happened and how I can prevent it happening again?

Thanks

 

[aart]

Could just be a glitch.
Are both those eggs from the same bird?
If it continues, then it's time to look at their overall diet and environment.