When we came across a group of men squatting with their bottoms only 2 inches off the ground (how can they hold that position so long?!) and cheering heartily at a bunch of chickens, we took a closer look.
We saw these two cocks going head to head, circling around and locking necks from time to time. The lack of feathers on their necks showed that they were veterans of the ring.
More reading: Hanoi under the skin