Would an extension cord from the house be a good enough electricity source lol? I have set up electric fences before but only the battery powered ones for horses, so I'm not quite sure how to set it up for chickens, other than setting it closer to the ground.
Extension cord or solar powered will do. Former is cheaper on front end but cord may be headache during yard maintenance.
Poultry netting could also be used as suggested but cost much higher and it will likely be much larger / longer than actually needed. The electric fencing could be setup so as to be difficult to see while poultry netting will stand out like a sore thumb.