Under Federal law we can't chase them, trap them ,harass them, relocate them or move their nests .We also aren't allowed to kill them or their young for killing livestock (etc chickens). We also can't have in our possession any body parts,eggs or feathers .In other words hands off per the US gov
Manicured lawns and pastures are hawk magnets.You have no coverage overhead and no hiding places. They need shrubs and bushes so hawk can't swoop down and grab one.