Panels could be a great idea.
You could even screw them together to be sturdier,
with clearance holes drilled for deck or drywall screws.
That how my brooder and wire wall for coop brooder goes.
Keep in mind if you need access, 4x4x4 pens might be difficult to use.
I assume the birds will be in the pens for a few weeks?
Keep thinking, sketch it out.
Wish I had space to make breeding pens.
You could even screw them together to be sturdier,
with clearance holes drilled for deck or drywall screws.
That how my brooder and wire wall for coop brooder goes.
Keep in mind if you need access, 4x4x4 pens might be difficult to use.
I assume the birds will be in the pens for a few weeks?
Keep thinking, sketch it out.
Wish I had space to make breeding pens.