The problem is you can't know how animals are treated. From any research you'd have to assume that if an animal is merely being raised to be killed and eaten and its being conducted on a mass scale for the profit or large agri-business, then an animal is merely a commodity, much like a chocolate bar - the difference being that the animal is a sentient being that feels pain, fear and distress. Why must they suffer horribly and have no right to quality of life just for humans sake? Its not like there aren't alternatives to eating meat. I'm healthier both physically and spiritually as a vegetarian then I was as a meat eater.
The answer seems to be that this world simply doesn't care about these things, so many people only care about themselves and making money, buying a house and car. The world has become too materialistic and cold
I'm not meaning to take a personal swing at anyone this is just how I feel about these issues.