Dr Temple Grandin is an expert in animal behaviour and works as a consultant for Slaughter Houses. One of the problems facilities can have is, (as you can imagine) getting animals into the facility calmly so they can be killed.
She has a YouTube Channel with everything you ever wanted to know about leading an animal to it's death in a way where it will just walk right into the facility and be calm right through the process. I found her videos to be morbid, but interesting.