An animal raised for meat, if it's treated right, can live a happy pampered life and have a relatively painless death. If it were left to live in the wild, on the other hand, it would constantly be in danger and have to work hard to survive, and when it did die it would probably be from either starvation, disease or predation. None of which are very nice ways to go.
So, as long as we try our best to get rid of battery farms and similar, I don't think there's anything at all wrong with eating animal products.