People like to make fun of utilitarianism. It's so easy to come up with hilarious examples showing how stupid it is. Serious people prefer something a little more Kantian, virtue ethics is unfashionable and pragmatism is just, well, embarrassing (I assume you'll make allowances for the fact that I actually have no real idea what I'm talking about).
So why do serious pundits on the blogosphere think that the old, "But they're so yummy!" argument is sufficient to explain why it's ok to eat animals? I'd guess it's because they think the topic isn't especially important. This begs the question though; it assumes that your current position is the correct one.
I just came across this post that makes a similar point
Same goes for meat eating. I should give it up rather than eat animals who lived miserable lives in factory farms. But if I can’t? Well, meat eating runs deep in a evolutionary, cultural and personal sense. Better to say “I should but I’m not going to” than come up with flimsy counterarguments.Although of course I'm complaining about the exact opposite.
Added: This is the best essay on animal ethics I've read. It doesn't focus much on the ethics of eating happy animals though. Also, the title and opening paragraph or so are not exactly well judged to draw skeptics in. Trust me though, it's a good essay.