It is a SAD sad story. The Tacobell bell dog was SO famous He could do anything, and go where ever he wanted to. One day he went for a walk around the factory where Tacos are made. He was looking around the Corn flower blender that makes those delicious Taco shells. The chef was carrying a huge bag of corn flower. He didn't see little Taco Bell Doggie standing there. He went to throw the bag over the edge of the blender and.... well you can pretty much figure out... This is why last Halloween they had the promotion: "Tacos, for a howling good dinner, visit Taco Bell". They weren't talking about ghosts and goblins!
It chased after a taco truck, then got caught by the dog-catcher. It then made a break for freedom on the garbage truck, rode the truck to a garbage barge, got on the barge and sailed away to Japan to become a successful game show host.