I think the argument against whale and dolphin hunting in the U.S. is that whales and dophins are highly intelligent and shouldn't be hunted, but at the same time Americans also eat a lot of pork but pigs are also highly intelligent. It is hypocrisy! When it comes to killing animals for food, according to buddhists all life is the same big or small so you are always in the wrong by eating other living things especially when you can live without doing so. But don't add value judgement to who can eat what when your own industry can be criticised. Only thing you can do I guess in modern society is kill and eat what your conscience allows you to.