That looks like a chicken tractor with a permanent run? You might want to enclose the whole thing into two separate living areas (by whole thing I mean the area covered with the roof. Then you can create a large run (or two) by using welded wire fencing and pounding some stakes/pipes into the ground. Run avian netting over the top.
The fencing part goes quick but you have to decide if it makes sense to build out the rest of that tractor or just get/build a separate hen house.
As your flock grows you will want a separate area/run for hens with chicks, a second rooster or whatever.
Thank you. This makes more sense to me know. Sometimes ya gotta hit me in the head, lol. Our winter can be cold in PA so I may look into insulation of some sort to keep them warm/cool. Their run is brand new so plantings and perches are just now going in for them.I agree with Ridgerunner and Sonya9. The part with a roof....wall it all in to make a 4x8 fully walled structure, take out the existing floor and inside wall, move the nest boxes and put a ramp on that end into the run. Easy peasy a coop with roof big enough.
I appreciate everyone's help with this.