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Pigs Can’t Fly: U.S. High-End Livestock Breeders Lose Millions in China Tariff Fallout

Dr. Mike Lemmon’s pigs, each valued between $2,500 and $5,000, were supposed to be on a plane bound for Hangzhou, China, from St. Louis in April, where’d they spend the flight snoring, play fighting and snacking on oats and husked corn before taking up residence at Chinese hog farms.

Instead, many went to a local Indiana slaughterhouse for less than $200 each after the Chinese buyer canceled the order within a week of China implementing retaliatory tariffs against the U.S. in April.

China is one of the biggest importers of American breeding pigs and other livestock genetic material such as cattle semen. These lucrative niche export markets had been growing, but dried up since U.S. President Donald Trump started a trade war with Beijing.

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Methionine Requirements for Lactating Sows - Cierra Kozole

Video: Methionine Requirements for Lactating Sows - Cierra Kozole


In this episode of The Swine Nutrition Blackbelt Podcast, Cierra Kozole, PhD candidate in Swine Nutrition at the University of Guelph, explains how methionine supports lactating sows beyond milk protein synthesis. She discusses updated requirement estimates, source comparisons, methylation demand, and why modern sow genetics may require more precise amino acid strategies. Listen now on all major platforms!

"Methionine supports protein synthesis while also serving critical functions through methylation pathways that influence multiple biological processes."

Meet the guest: Cierra Kozole / cierra-kozole-772b64253 is a PhD candidate in Swine Nutrition at the University of Guelph in Canada. Her doctoral research focuses on refining estimates of methionine requirements for primiparous lactating sows, including evaluating methionine sources, nutrient partitioning, methylation reactions, and the links among amino acid supply, milk production, and sow protein retention. Learn more from Cierra Kozole on The Swine Nutrition Blackbelt Podcast, available on all major platforms.