In the Philippines, the 6,000 year-old sport of cockfighting has been transformed into a fully-legal, billion dollar industry. Known locally as sabong, it takes place in 2,500 dedicated stadiums across the country and kills an estimated 30 million roosters each year.A few months back, VICE Australia hit the cockpits and hatcheries of Manila. There we met the breeders, trainers, and philosophers who help make sabong the Philippines's national obsession.