The Top 5 companies, in terms of number of birds slaughtered, are:
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JBS S.A., Brazil, 3,380 million birds slaughtered
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Tyson Foods, U.S., 2,310 million birds slaughtered
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BRF, Brazil, 1,664 million birds slaughtered
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CP Group, Thailand, 939 million birds slaughtered
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Wen's Food Group, China, 714 million birds slaughtered
https://www.wattagnet.com/articles/25684-infographic-worlds---largest-poultry-producing-companies