Cookie Chomper III was Alvin, Simon and Theodore's first pet, a stray kitten that finds its way into the Seville house through an open window. Alvin wanted to named him "Chomper", Theodore wanted to named him "Cookie", and Simon wanted him to have a more sophisticated name, so they called him Cookie Chomper III. Dave agrees to let them keep him and even buys a collar and tag. Later, Simon helps Dave overcome his allergy to cats.
Death
However soon Cookie Chomper is hit by a car and killed. Dave helps the boys deal with their grief and embrace the memories of their brief but happy time with Cookie Chomper III, and later they adopt Lilly.
Appearence
He is seen throughout the episode.
Trivia
- Like Cookie Chomper III, Tiger Lilly, Ross Bagdasarian Jr. and Janice Karman's dog, was also run over by a car and killed