Hogs and cattle are seen as economic beasts, and if they die they are culled from the group. But dolphins are treated more like people. They are watched constantly, given immunization periodically, fed vitamin supplements, and so on.
豬、牛是經濟動物，死了就淘汰；但養海豚就像養人，得隨時注意，定期打預防針、補充維他命等，盡其所能地照顧它們。