Apocalypse

After twolegs destroyed everything they've created they all disappeared. But what about the animals? A horrid sickness came from the leftover twoleg waste, and animals all over the world get infected. But it's not just as fatal as you think. After catching the sickness the animal will die, but after a while it will rise again. The animal is now a dead body. It feels no pain, and is figured to have no thoughts. Or do they? Now a group of cats try their best to survive these hardships.