Dr. Larry Carbone is a veterinarian at the University of California, San Francisco. He is the author of What Animals Want: Expertise and Advocacy in Laboratory Animal Welfare Policy.

Theodora Capaldo is president/executive director of the New England Anti-Vivisection Society, which spearheads Project R&R: Release and Restitution for Chimpanzees in U.S. Laboratories. Capaldo is a licensed psychologist, a trustee of the American Fund for Alternatives to Animal Research and past president of Psychologists for the Ethical Treatment of Animals.

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.”

A June 2, 2009, Wichita Eagle profile says that when Roeder turned to religion he became “adamant about his Old Testament beliefs and observed the Sabbath from Friday night through Saturday.”

Feb. 11, 2009, 60 Minutes article about the practice of some Los Angles hospitals discharging homeless patients to Skid Row. The article includes a link to a May 21, 2007, 60 Minutes segment by Anderson Cooper about the practice.

Zoo Torah is the blog of Israeli Rabbi Natan Slifkin, who uses the Jewish scriptures to teach about Judaism and its relation to animals.

Humane Religion was once a bimonthly magazine devoted to promoting a Christianity dedicated to animal welfare, based in Sarasota, Fla. It is affiliated with all-creatures.org.

The Animals Voice is a nonprofit animal rights organization that publishes an online magazine of the same name. It is based in Chico, Calif. Contact through the website.

The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service dedicates a section of its Web site to animal welfare issues.