What's right and wrong?

Switching to vegetarianism will not prevent inhumane slaughter of animals; if you don't eat it, someone else will. They fill their quota regardless if you switch to vegetarianism or not. You can live entirely on a vegetarian and supplemental diet, but I prefer my meat because it's a hell of a lot easier and cheaper to get my nutrients that way. The only way to change the way abbatoirs kill livestock is to apply pressure on the companies that prepare the meat.