The second version of Snowball named Snowball II was killed Dr. Hibbert 's Mercedes-Benz G500 . In the episode `` I , ( Annoyed Grunt ) - Bot '' , Snowball II was hit and killed by Dr. Hibbert 's Mercedes-Benz G500 . After numerous fleeting replacements for Snowball II , the fifth ( and last surviving ) Snowball was named Snowball II to avoid future confusion and having to spend more money on a new bowl .