Why the bonus eggs?

[Zoeyschicks]

I mean its not impossible for hens to lay two eggs in one day. Especially beginning spring when weather warms up, sun is out more, and hormones are raging, lol. A change in diet can contribute as well. Have you switched their feed or added something new?

Nope, same feed as always plus they get to run around the yard for a couple hours when I get home.
I just couldn't believe they all laid bonus eggs the same day