Found the second egg today.
It was broken.
We found the first egg up on the roost, balanced on the flat side of the board, 2 days ago. No egg yesterday. This morning, we opened the pen to find that another egg had been laid while up on the roost and it feel and broke.
I have 2 milk crates on the floor of the pen, each with a golf ball in it. The girls are not using the nest boxes.
How can I break the new and only layer from laying while up on the roost before the others follow her lead? Please help.

We found the first egg up on the roost, balanced on the flat side of the board, 2 days ago. No egg yesterday. This morning, we opened the pen to find that another egg had been laid while up on the roost and it feel and broke.
I have 2 milk crates on the floor of the pen, each with a golf ball in it. The girls are not using the nest boxes.
How can I break the new and only layer from laying while up on the roost before the others follow her lead? Please help.