Source: Danny Hakim, NY TIMES, 3/23/18

Ben Holland holds a Mason jar, tilting it slightly to show the powdery 90 milligrams of the antibiotic tylosin inside.
“It’s about the amount that one animal gets in a day,” he explains, in a small factory that produces feed for 48,000-odd cattle packed in pens in Tulia, Tex., south of Amarillo. Nearby, rumbling steam towers turn corn kernels into flakes.

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