During the 2014 Tournament of Roses Parade, SeaWorld's float was accompanied by police in Pasadena, Calif. PETA supporters were arrested for protesting the float that day, and PETA claims that a SeaWorld employee posing as a PETA volunteer tipped police off to the protest. Ringo H.W. Chiu/AP hide caption

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Ringo H.W. Chiu/AP

PETA Says Undercover SeaWorld Employee Posed As Animal Rights Activist

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Elephant acts at Ringling Bros. and Barnum & Bailey Circus will be phased out by 2018, the circus' parent company said today. The elephants will retire to a conservation center in Polk City, Fla. Tamika Moore/AL.com/Landov hide caption

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Tamika Moore/AL.com/Landov

Trainer Jimmy McConnell of Shelbyville, Tenn., rides champion walking horse Watch It Now before a 2009 football game in Knoxville, Tenn. Celebrations of the breed's distinctive gait are a 75-year-old tradition, but animal rights activists say that for many of those decades, the walking horse industry has abused animals to get their knees even higher. Wade Payne/AP hide caption

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Wade Payne/AP

Making Sure Those Walking Horses Aren't Hurting Horses

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Free-range chickens lay eggs for Sauder's Quality Eggs in Pennsylvania. Dan Charles/NPR hide caption

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Dan Charles/NPR

States Fight California's Chicken Cage Law. But It's Really About Bacon

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Chimpanzee Toni celebrated his 50th birthday at the Hellabrunn Zoo in Munich on Nov. 22, 2011. Sven Hoppe/DPA/Landov hide caption

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Sven Hoppe/DPA/Landov

Rule Would List All Chimps As Endangered, Even Lab Animals

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Michael Sharry visits with Bill, front, and Lou (now deceased) on Nov. 8, 2012, at Green Mountain College in Poultney, Vermont. Toby Talbot/AP hide caption

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Toby Talbot/AP

After a leg injury didn't heal well earlier this year, Lou has difficulty walking. He and his partner, Bill, will be slaughtered at the end of the month, and their meat will be used to feed students at Green Mountain College in Vermont. Nina Keck/Vermont Public Radio hide caption

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Nina Keck/Vermont Public Radio

Despite Protest, College Plans To Slaughter, Serve Farm's Beloved Oxen

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A man holds a sign during a "Dogs Against Romney" demonstration outside the 136th Westminster Kennel Club Dog Show at New York's Madison Square Garden, on Tuesday. Shannon Stapleton /Reuters/Landov hide caption

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Shannon Stapleton /Reuters/Landov

Why Romney's Shaggy Dog Story Won't Die

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Breeding sows in crates at a subsidiary of Smithfield Foods in 2010. The photo was shot by the Humane Society as part of an undercover investigation. Humane Society/Associated Press hide caption

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Humane Society/Associated Press

A chimpanzee eats a coconut at the Alamogordo Primate Facility at Holloman Air Force Base, N.M., in an undated photo from the National Institutes of Health. A plan to move chimps that had retired to the facility after being subjects of medical experiments sparked controversy and a review of research policies. AP hide caption

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AP

Biomedical Research Using Chimps Curtailed

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