The run is a little over 5 feet x a little over 5 feet. It was blowing rain and snow yesterday so I kept them inside. I didn't want their little down coats to be soaked. And the ground was muddy.Mine go out even at zero degrees. Wind and cold they spend a lot more time inside.
How big is the run on your coop? Maybe an extension you can cover would be nice.
I built this tiny broody house and that run (roughly 4x6x2) held a tarp on top and snow/rain did not sag the wire.
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To open the run that lid is hinged.