During the Middle Ages and up until the Salem Witch Trials, cats were killed alongside their owners who were believed to be practicing the dark arts of magic, sorcery, and witchcraft. Typically cats were burned alive in ceremonial bonfires. Ironically, had this not occurred, the Bubonic Plague probably wouldn’t have been as prolific as it was as the fleas found upon the rats who carried the disease, would have been killed alongside their host by the very cats which were killed in droves by human beings. Cats are partially resistant to the Bubonic Plague but with few to keep the rat population in check, the plague was able to wash over Europe and kill 25,000,000 (25 million) people which was 25% of the European population