Hi again, thrylix, good to see you still around. But I think your original post has been exhaustively dealt with already...what more do you wish to know?
Killing living beings, who (like us) feel pain and/or want life and fear death, is wrong, whether that being is an ant, a dog or a human. Sure, the more complex the nervous and emotional system is, the more suffering you cause and the worse the kamma is, but that doesn't mean that even the tiniest creatures are unworthy of our compassion. It's actually such a basic knowledge (and an important one) that I suggest you reflect on it, study it, imbibe it, and live by it, asap. This will be for your long term benefit, and will also spare many other beings needless pain and suffering. Some things really are just that simple.
There is a 'discovering theravada' forum, I believe, if you go there you might find info relating to such very basic, yet crucial, points of dhamma. Might be worth visiting.
Then the Blessed One, picking up a tiny bit of dust with the tip of his fingernail, said to the monk, "There isn't even this much form...feeling...
perception...fabrications...consciousness that is constant, lasting, eternal, not subject to change, that will stay just as it is as long as eternity."