Have you heard about spider fighting (kaka fighting)?
Apparently it exists only in 3 countries in the world, Singapore, Japan, and the Philippines. And in the Philippines, spider fighting has been around more than cock fighting (Sabong actually came from Spain) though cock fighting seems more popular and involves bigger money. In fact, spider fighting and cock fighting are a lot similar in many ways; the way they find opponents, the way they bet money, the way they treat their fighters (?), and the way they are passionate about.