What was the most extreme case of animal abuse in history?

One of the most extreme cases of animal abuse in history is the 2009 case involving Michael Vick, a former NFL quarterback, who was found to be running an illegal dogfighting ring. Investigators discovered that Vick and his associates had brutally abused, tortured, and killed dogs that did not perform well in fights. The case garnered national attention, leading to his conviction and a prison sentence, while also sparking significant public outrage and increased awareness about animal cruelty and dogfighting. This incident highlighted the broader issue of animal abuse and prompted discussions about animal rights and welfare.