Jacquie Calnan is president of Americans for Medical Progress, a nonprofit group that views the use of animals in medical research as vital and opposes what it calls “animal rights extremism.”

Richard D. Stratton is the editor of Kindness to Animals and Caring for the Earth: Selections From the Sermons and Writings of Latter-day Saint Church Leaders.

Susan Chernak McElroy is the author of All My Relations: Living With Animals as Teachers and Healers and Why Buffalo Dance: Animal and Wilderness Meditations Through the Seasons (2006).

Sandra Helton is an astrologer and spiritualist who conducts animal spirituality workshops. She is also active in animal activism.

Diana L. Guerrero is an animal behaviorist and the author of What Animals Can Teach Us About Spirituality. She is based in Southern California.

Rynn Berry is the author of Food for the Gods: Vegetarianism & the World’s Religions and an adviser to the North American Vegetarian Society. He is based in New York City.

Calvin DeWitt is a professor at the Nelson Institute for Environmental Studies at the University of Wisconsin-Madison. He is concerned with the ethics of farming and uses of the natural environment, including animals. He is co-founder of the International Evangelical Environmental Network.

Eric Reinders is an associate professor of religion at Emory University in Atlanta. He has written about Buddhist attitudes toward animals.

Kerry Walters is a philosophy professor at Gettysburg College in Gettysburg, Pa. With Lisa Portmess, she co-authored two books, one about the history of religious vegetarianism and the other on the history of ethical vegetarianism.