Grandin may be the world’s most famous person with autism, and she is most certainly the world’s premiere force of change for cattle at the point of slaughter. Half the cattle processing facilities in the U.S. and Canada now use the humane techniques she has developed over the last decade. Grandin, 58, who has a doctorate in animal science, teaches at Colorado State University and travels the country diagnosing hissing air, dangling chains, mismatched stair steads – details that make cattle afraid and skittish.

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