I think that animals should only be killed for a useful purpose and that it should be done quickly.
Would you arrest a lion for murdering a giraffe?
A lion doesn't inflict multiple small wounds with the intention of causing harm but not death, a lion is simply trying kill its prey to be eaten.

That said, I quite enjoy killing cane toads, which are Australia's worst pest. Ask any Queenslander or northern New South Welshman, it's practically a sport over here. Sure I wouldn't kill them if they weren't a pest, but I enjoy it, and I do it in ways that would probably be considered cruel, golf clubs, shovels, cricket bats etc, and having cane toad guts on your wheels is a testament to you driving skills

I suppose it comes down to what feels wrong, and that is different for everyone. I personally don't feel that squishing a cane toad till its guts are coming out of it's still living mouth to be wrong, but I do consider the example of bull fighting to be wrong.

But we should all remember that killing pandas for fun is always right.

Spoiler Alert, click show to read: 
Quote Originally Posted by Sasaki Kojiro View Post
I suppose the only reason people watch nascar is for the car crashes.
Of course they do, watching a car drive in a circle 300 times isn't fun. You Americans have funny taste in racing.