Alliance for Animals
http://www.allanimals.org/

American Horse Defense Fund
http://www.ahdf.org/

American Humane Association
http://www.americanhumane.org/

American Society for the Prevention of Cruelty to Animals
http://www.aspca.org/

Animal Aid
http://www.animalaid.org.uk/

Animal Concerns
http://www.animalconcerns.org/

Animal Freedom
http://www.animalfreedom.org/

Animal Legal Defense Fund
http://www.aldf.org/

Animal Protection Institute
http://www.bornfreeusa.org/

Animal Welfare Institute
http://www.awionline.org/

Asian Animal Protection Network
http://www.aapn.org/

Brigitte Bardot Foundation
http://www.fondationbrigittebardot.fr/

Captive Animals’ Protection Society
http://www.captiveanimals.org/

Compassion in World Farming
http://www.ciwf.org.uk/

Defenders of Animals
http://www.defendersofanimals.org/

Farm Animal Rights Movement
http://www.farmusa.org/

Farm Sanctuary
http://www.farmsanctuary.org/

Friends of Animals
http://www.friendsofanimals.org/

Group for the Education of Animal-Related Issues
http://www.geari.org/

Hugs for Homeless Animals
http://www.h4ha.org/

Humane Farming Association
http://www.hfa.org/

Humane Society
http://www.humanesociety.org/

Human Society Legislative Fund
http://www.hslf.org/

In Defense of Animals
http://www.idausa.org/

Infurmation
http://www.infurmation.com/

International Fund for Animal Welfare
http://www.ifaw.org/

International League for the Protection of Horses
http://www.worldhorsewelfare.org/

International Society for Animal Rights
http://www.isaronline.org/

League of Humane Voters
http://www.humanevoters.org/

People for the Ethical Treatment of Animals
http://www.peta.org/

Performing Animal Welfare Society
http://www.pawsweb.org/

Progressive Animal Welfare Society
http://paws.org/

Psychologists for the Ethical Treatment of Animals
http://www.animalsandsociety.org/

Showing Animals Respect and Kindness
http://www.sharkonline.org/

Sirius Global Animal Organisation
http://sirius.2kat.net/

Sled Dog Action Coalition
http://www.helpsleddogs.org/

Society for the Prevention of Cruelty to Animals
http://www.spcai.org/

Society for the Protection of Animals Abroad
http://www.spana.org/

Red Rover
http://www.redrover.org

United Poultry Concerns
http://www.upc-online.org/

Wildlife Land Trust
http://www.wlt.org/

World Society for the Protection of Animals
http://www.wspa.org.uk/

Zoo Outreach Organisation
http://www.zooreach.org/