egg with shell and one without

[tuckertori]

I have 2 - 6 month old barred rocks that have been laying one egg with a hard shell in the morning and one egg without a shell in the evening. Any ideas why they are laying 2 eggs in one day when the second one isn't fully ready?

 

[citychickx6]

They are still young and need to get into the routine a little more. No worries it is normal.

but normal.