Taco Bell has built quite a large business on the premise of combining the same five ingredients into a wide variety of food items in different shapes and sizes, with a wide price range. Staying open through the wee hours helped a lot, too. They've not been as successful with their quirky advertising campaigns, though. The biggest and most memorable was the Taco Bell chihuahua that was everywhere in the late 1990s. The dog was cute, the scenarios were funny, and you saw those ads every time you turned a TV on. The chihuahua image was made into plush dolls and graced t-shirts. Then suddenly, the ads with the chihuahua were gone, and no one really noticed because, well, it was advertising after all. Weird History Food explains where the chihuahua came from, how he (or actually, she) became a sensation, and why the dog disappeared so quickly. Spoiler: no, it wasn't because the dog died.