A: Chickens are smart. They're strong. They're fast. They know how to fight.
They know how to kill.
When backed in a corner, they will attack, with reckless abandon - wings flapping, beak snapping, claws tearing - until they can't attack anymore.
They don't walk in a circle, lie down and wait to be slaughtered. That's what cows do. As you just saw.
But that's typical of a dairy farmer, bringing a cow to a cock fight.