The perky pooch stars in the only light comedy in a market heavy on drama.
The weekend's No. 2 flick also provided a dose of escapism for horror fans - the fright film "Quarantine."
A trio of big Hollywood names - Leonardo DiCaprio, Russell Crowe and director Ridley Scott - had to settle for third place with the debut of their terrorism thriller "Body of Lies."
The flick centers on a CIA operative hunting the terrorist responsible for bombings around the world. It might have been too dark a theme for audiences after a week of gloomy Wall Street news.