But stepping into the flight zone panics the cattle, and they change from soft moos to...

Temple Grandin: But stepping into the flight zone panics the cattle, and they change from soft moos to loud mooing. Like, prey animals don't make noises that will draw attention to them unless they're trying to warn other members of the herd. Professor Shanklin: So they're warning each other they're going to be slaughtered? Temple Grandin: No, no, no, sir. The loud mooing is the same whether they're gonna be dipped, driven around a hard corner or taken to slaughter. I mean, they have no idea what's gonna happen to them... Professor Shanklin: [interjecting] I'm glad we agree on that. Temple Grandin: [rambling on] ... but they're spooked. And spooked cattle don't act straight. They get bruised, scraped, drowned, and that all costs money. And it takes a good half hour to calm a herd and that costs money, too. It's not a good way to run a stockyard.