I am not by no means a vegetarian, but the one and only place I will not eat meat is KFC. Its not so well publicised here in the UK as some other countries (I learned about it in Germany) but like agent zed says its the way they are reared.
There are as many chickens as humans on the planet but no other is treated so badly and on such a huge scale.
Here`s a quick video, and yes it is Pamela Anderson, but the rest of the birds dont look so good (not for the kids by the way)
http://www.youtube.com/watch?v=PFgbHK6yP2g