Read it through once

As twilight fell the old bull stood with lowered head, watching his mates—the cows he had known, the calves he had fathered, the bulls he had mastered—as they shambled on at a rapid pace through the fading light. He could not follow, for before his nose leaped the merciless fanged terror that would not let him go. Three hundredweight more than half a ton he weighed; he had lived a long, strong life, full of fight and struggle, and at the end he faced death at the teeth of a creature whose head did not reach beyond his great knuckled knees.