Me and @TheGoalieFox made this story :) There once was a dog, he died. The dog was immortal, and it faked its death. everyone thought it was dead, and then, 10 years later, it comes back and everyone is terrified. They start a manhunt on the dog, and then they catch it and scientists study it. They notice the dog has been eating odd things, such as uranium and other radioactive minerals, and that's what makes the dog immortal. Because the dog has been eating those things, the dog explodes soon after being tested. the explosion was so big, it wiped out the city. The nuclear explosion from the things the dog was eating affected the surrounding cities. The president of the country decided that they should destroy all existing dogs, so nothing like that would ever happen again. To investigate how bad the damage was, the president went to the explosion site, and got poisoned from the nuclear waste. The president goes to the hospital and dies soon after, and the vice president takes office. but the vice president is kinda evil. He raised the taxes! Since the taxes are so high, people can't afford to live in the country and move elsewhere. Because the people have committed crimes hunting down an animal, they are not allowed to immigrate, and the country gets bombed by the country that had the most people want to come in to the country. Since the country just blew up, everyone who lived in the country is now blown up, and there is just a huge fire where the country used to be. Now that nobody lives there, the rest of the world uses it as a battlefield for a new war: WW3. WW3 is so bad that every county wipes out every other country and there is no people left on earth. Because there are no more humans or dogs, the cats take over the world.
Credits to @TheGoalieFox for half the story.