The only way I would put a fence around the yard like that would be if I put electric on it too with extended insulators. That would be killing two birds with one stone instead of having electric around the pens and then a fence that basically doesn’t stop the animals that will eat your chickens. I have a welded wire fence with electric like I described and it’s a pain in the ass to maintain. The insulators bust in the cold, the electric wire touches the fence and grounds the whole thing. Branches and trees fall etc... the grass has to be kept short around the bottom wire and the list goes on. More power to ya though.