From the SYSK Podcast episode How Animal Domestication works:
Zebras account for more injuries to zoo keepers than any other animal at the zoo! – Man, that is one pissed off stripey horse!
An animal that does follow a social hierarchy is basically prearranged to be domesticated. ‘Cause you just take that alpha male, you punch him in the face a couple of times in front of everybody, make ’em cry, and then now you’re the alpha male! And you say, “Start laying eggs!” And they listen to you! And then they’re domesticated. – After you have punched the chicken?
You really should listen to Stuff you should know. (Podcast on iTunes) It’s great fun!
I also highly recommend the episode How the Human Microbiome Project works.