In your opinion, what is the worst act/example of animal cruelty in the world today?

There are many examples of animal cruelty happening in the world today. In your opinion, what do you think is the worst (or one of the worst)? As an animal lover, I think bullfighting is one of the most, if not the most cruel——putting a bull in the ring as it suffers a slow and agonizing death, while thousands of spectators cheer at its torture. How barbaric! What are some other intolerable examples of animal cruelty in the world today that you deem to be the worst or one of the worst?