Remember they'll go into the coop for shade if there's insufficient outdoor shade at the moment or it's already occupied by another chicken. Also every time they want a drink or snack, they will go in there. I really would not do wire (and if I did, I really would not use your fridge shelving, because the 3" long slots look like they could easily let toes slip down thru and cause aggravation if not injuries).
My tractor has a wire mesh vent at roost height, and sometimes they sit looking out and sometimes not, mostly not, though (based on the times I've been out there at night).
Pat
My tractor has a wire mesh vent at roost height, and sometimes they sit looking out and sometimes not, mostly not, though (based on the times I've been out there at night).
Pat