Sophie is Claudia Furschtein's small dog who dislikes Klaus in The Chipmunk Adventure.
Sophie is believed to be a Yorkshire Terrier. She is perceived to be nice at the beginning of the movie but proves to be as cold-hearted as Claudia.
Acts of her wild nature include:
- Ripping Klaus Furschtein's Pierre Cardin´ socks.
- Popping Klaus' floating pool chair for him getting water on her.
She seems to only have sympathy for Claudia, and very little for Klaus.