People for the Ethical Treatment of Animals (PETA)

http://www.peta.org/

People for the Ethical Treatment of Animals (PETA), with more than 2 million members and supporters, is the largest animal rights organization in the world. PETA focuses its attention on the four areas in which the largest numbers of animals suffer the most intensely for the longest periods of time: on factory farms, in laboratories, in the clothing trade, and in the entertainment industry.