They think, feel pain.

MiamiHerald.com | 11/10/2006 | They think, feel pain

An excerpt:

Unfortunately, as our knowledge and understanding of animal awareness and sentience advances, our treatment of them lags further behind. We kill tens of billions of animals yearly, and the toll is rising. In just the time it takes you to read this sentence, a thousand factory-farmed chickens will have been slaughtered in the United States. Like most farmed animals today, they are deprived of the freedom to move about, fresh air to breathe and the sun on their backs.