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

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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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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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