Livestock farming

Trainer Bob Baffert looks out from his barn before a workout at Churchill Downs Wednesday, May 1, 2019, in Louisville, Ky. (AP Photo/Charlie Riedel, File)

In this April 2, 2019, photo, pigs eat from a trough at the Las Vegas Livestock pig farm in Las Vegas. The farm feeds their pigs with food wast from Las Vegas casinos. (AP Photo/John Locher)

This combination of images provided by the Yale School of Medicine in April 2019 shows stained microscope photos of neurons, green; astrocytes, red, and cell nuclei, blue, from a pig brain left untreated for 10 hours after death, left, and another with a specially designed blood substitute pumped through it. By medical standards “this is not a living brain,” said Nenad Sestan of the Yale School of Medicine, one of the researchers reporting the results Wednesday, April 17, 2019, in the journal Nature. But the work revealed a surprising degree of resilience within a brain that has lost its supply of blood and oxygen, he said. (Stefano G. Daniele, Zvonimir Vrselja/Sestan Laboratory/Yale School of Medicine)

This combination of images provided by the Yale School of Medicine in April 2019 shows stained microscope photos of neurons, green; astrocytes, red, and cell nuclei, blue, from a pig brain left untreated for 10 hours after death, left, and another with a specially designed blood substitute pumped through it. By medical standards “this is not a living brain,” said Nenad Sestan of the Yale School of Medicine, one of the researchers reporting the results Wednesday, April 17, 2019, in the journal Nature. But the work revealed a surprising degree of resilience within a brain that has lost its supply of blood and oxygen, he said. (Stefano G. Daniele, Zvonimir Vrselja/Sestan Laboratory/Yale School of Medicine)

FILE - In this Friday, April 6, 2018 file photo, cows stand at Nate Elzinga's farm in Zeeland, Mich., on the day of an auction where Elzinga and his partners sold the herd. Market forces and larger milking operations made it difficult for them to be profitable. A new federal program to help hard-pressed dairy farmers is expected to be ready for enrollment in June 2019, as farmers undergo their fifth year of low milk prices that have driven thousands out of business. (Neil Blake/The Grand Rapids Press via AP, File)

People talk through a fence near a banner, declaring the participation at the indefinite nationwide teachers' pay strike, at the Primary School number 68 in Warsaw, Poland, on Monday, April 8, 2019. Majority of Poland's school and kindergarten teachers went on strike after talks about their payment with the government failed. (AP Photo/Czarek Sokolowski)