Earlier quoted context omitted.
I wouldn’t say our chickens are mean. They are incredibly stupid though. Some kinds of birds can be smart, but chickens aren’t one of them.
Nonsense. I've even had hens that paired together to open doors – one flying repeatedly on the handle, another one pushing the door. And those were reform hens that seemed particularly blunt relative to their peers.
Most research on animals is conducted after we’ve placed them in mind numbing cages and in non social environments (and if they are with other animals they’re crammed in together).
Imagine living your entire life either in solitary and/or packed in a Japanese subway car, and someone doing research being shocked you’re acting in anti-social ways.