Direct Citations
Jeremy Rifkin a noted author and political analyst wrote, "Studies on pigs' social behavior funded by McDonald's at Purdue University, for example, have found that they crave affection and are easily depressed if isolated or denied playtime with each other" (Rifkin).
Indirect Citations
The author further argues that pigs become depressed when they lack human contact and are isolated from each other (Rifkin).
Works Cited
Braithwaite, Victoria. "Hooked on a Myth: Do Fish Feel Pain? A Biologist Says We Shouldn’t Be So
Quick to Believe They Don’t." Los Angeles Times. 8 October 2006.
Humane Society, The. "Animal Cruelty: Facts and Stats." The Humane Society of the United States.
2016. http://www.humanesociety.org/issues/abuse_neglect/facts/animal_cruelty_facts_statistics.html Accessed 30 November 2016.
Rifkin, Jeremy. "A Change of Heart About Animals." Los Angeles Times. 1 September 2003.
Yong, Ed. "Of Primates and Personhood: Will According Rights and “Dignity” to Nonhuman Organisms
Halt Research?" Seedmagazine.com. 12 December 2008.