God left meat off the garden menu and said "it was good", humans historically and biblically didn't eat meat until the fall of man. If God says it's good, I'll take his word.
I also cosider the squeemish factor to be a powerful indicator of what is right and what is wrong. And I feel pretty good when im in my garden collecting my veggies. I'm not sure I could handle slaughtering an animal, even if it didn't make a sound, theres still the squeemish factor for me, it's just not right. God loves animals and their existance glorifies god, but when we humiliate them and treat them as "units of production",rather than the beautiful creatures of god they are, something has gone wrong, terribly terribly wrong.