I went for another wander around the local market today, and happened to catch the chicken sellers kill a bunch of them and turn them into what I would see at the local supermarket. The process was quick and efficient, the Indonesians seemed to wonder why I had so much interest in something that was so everyday and mundane to them.
This contraption is powered by a noisy motor that makes the drum turn round. The feathers come out of the bottom, and when the chickens are pulled back out, they look just like what you would buy at the supermarket (except with yellow feet!).