[1104] Sheep warn the shepherd of coming storm when they rush to pasture in haste beyond their wont, but some behind the flock, now rams, now lambs, sport by the way with butting horns, when some here, some there, they bound aloft, the sillier young with four feet off the ground, the horned elders with two, or when the shepherd moves an unwilling flock, though it be evening when he drives them to their pens, while ever and anon they pluck the grass,
urged by many a stone.
Aratus - Phaenomena
