Horse Tripping by In Defense of Animals:  http://www.idausa.org/facts/horsetripping.html
Rodeos by In Defense of Animals:  http://www.idausa.org/facts/rodoes.html
Rodeos by PETA:  http://www.peta-online.org/mc/facts/fsent1.html
Rodeos by SHARK:  http://www.sharkonline.org/rodeocruelty
Rodeo Site by PETA:  http://www.BuckTheRodeo.com

Aquariums are jails for dolphins and marine mammals:  http://www.DolphinFreedom.com
Marine Mammal Parks:  http://www.peta-online.org/mc/facts/fsent8.html
HSUS Marine Mammal Site:  http://www.hsus.org/programs/wildlife/marine/index.html
Dolphin Freedom by PETA:  http://www.dolphinfreedom.com
Lolita, Slave to Marine Parks:  http://www.slavetoentertainment.com

Zoos

Zoo Facts by PETA:  http://www.peta-online.org/mc/facts/fsent2.html
Stationary Exhibitations/Acts:  http://www.peta-online.org/mc/facts/fsent10.html

Greyhound Racing

Greyhound by In Defense of Animals:  http://www.idausa.org/facts/racing.html
Greyhound Racing fact sheet by PETA:  http://www.peta-online.org/mc/facts/fsent2.html
Greyhound Racing Facts by HSUS:  http://www.hsus.org/programs/companion/pet_cruelty/greyhound_racing.html
Iditarod Facts by HSUS:  http://www.hsus.org/programs/companion/pet_cruelty/iditarod.html

Animal Fighting

Bull, Cock, and Dog Fighting by In Defense of Animals:  http://www.idausa.org/facts/fighting.html
Bullfighting Fact Sheet by PETA:  http://www.peta-online.org/mc/facts/fsent6.html
Dogfighting Facts by HSUS:  http://www.hsus.org/current/dogfighting_facts.html
Why Dogfighting Must Be a Felony by HSUS:  http://www.hsus.org/current/dogfighting_felony.html
Cockfighting Facts by HSUS:  http://www.hsus.org/current/cockfighting_facts.html

Carriage Horses

Fact Sheet on Carriage Horse Rides:  http://www.peta-online.org/mc/facts/fsent9.html