Indeed, as the science magazine Discover noted recently, Grandin, a 58-year-old Colorado State University associate professor of animal science, has probably done more to improve welfare for animals at the point of slaughter than any human alive. More than half of all cattle in the US, and a growing number in Britain, are moved through handling facilities she designed. Restraint chutes are one of her acknowledged specialities; she also developed the curved lane design used by some yards, intuiting that cattle would move more comfortably through something that made use of their natural tendency towards circling behaviour.

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