I'll borrow somewhat from Mordin Solus here;
It's wrong to harm any individual from a species that has members capable of calculus.
Basically I object to harming sapient life without reason. Even if it's non-sapient life, I object to just harming it for shits and giggles. Let's take a cow; they are slaughtered for meat. Ideally the killing should be as painless as possible and their lives up until that point should be of good quality.
Other than that, killing or harming should only be done with good reason; self-defence comes to mind.
It's wrong to harm any individual from a species that has members capable of calculus.
Basically I object to harming sapient life without reason. Even if it's non-sapient life, I object to just harming it for shits and giggles. Let's take a cow; they are slaughtered for meat. Ideally the killing should be as painless as possible and their lives up until that point should be of good quality.
Other than that, killing or harming should only be done with good reason; self-defence comes to mind.