Lassie

When there's trouble at hand, Lassie has the answer. This smart, lovable and loyal Collie has been portrayed in different settings for decades. Television shows, movies and toys have all featured Timmy's best friend. Lassie is known for sensing trouble and rescuing others. She has been well loved by generations of children.

Interestingly, even though Lassie is a female, all the dogs who portrayed her on television were male because they are larger and have a thicker coat, which looks good on the screen. The first dog to play Lassie on television was named Pal.