Visitors at the 27th Asian Pet Show in Shanghai were recently shocked by the full-back tattoo of a Mexican hairless dog whose owner claimed it didn’t feel any pain.

Photos of a hairless dog with a Yakuza-style full-back tattoo recently went viral on Chinese social media, sparking outrage among animal lovers. The pics were taken at the Asian Pet Show held at the Shanghai New International Expo Center earlier this month, where the dog was one of the most popular attractions. According to multiple media sources, the dog’s owner proudly showed off the massive artwork on its back, confirming that it was a real tattoo for which his pet didn’t need anesthesia because of its high tolerance for pain.