Depends on your aerial predators, and your tolerance for loss. All hawks are pretty smart and can evade any barriers that leave space for them to fit through. Woodland hawks actually are totally suited to flying in between things like string & branches.
@BY Bob has video (I think) of a Cooper’s hawk hopping down through a tall bush going after finches. As one who lost a hen to a Red Tail hawk that flew around the edges of a piece of aviary netting set above like a rain tarp and trapped the hen against fencing, I recommend aviary netting secured on all sides.
Actually, Mr. Chips may stick with his most willing, non-combatant hen (his mom). He might get better at grabbing others if he’s really amped up, or he may learn his manners with them and respect their wishes. From what I’ve read it depends on how high his hormones drive him, and that is very individual to the roo. Meanwhile, his mom is doing the others a favor taking the heat off!