delegate; envoy / messenger; emissary / act of sending someone for an errand (to a place or person)

messenger pigeon; carrier pigeon; homing pigeon

second plowing of a field

high-shouldered but short-necked

impulsive; acting upon impulse without thinking

rushing forward; advancing quickly; sudden dash (in an attack, etc.) / sudden departure or leaving (to a certain place, especially due to something urgent)