I had read about this before -- "art" that involves torturing animals -- but had no idea it was so popular. Here, the word "torture" isn't used in the way you often hear animal rights activists using it, for example to describe caging animals for circuses or zoos. Here, "torture" means torture, abuse and murder. One artist even filmed the bludgeoning to death of several animals "for art's sake."
Below is a video of a man named Wim Delvoye tattooing a clearly uncomfortable pig in Beijing: