Best known as "Toto" from the Wizard of Oz, the Cairn Terrier is a small, hardy working terrier. Originally bred to aid Scottish farmers in ridding their properties of pests, Cairns today use their tenacity to excel in obedience, agility, terrier and tracking trials. Alert and active, this breed possesses a harsh, weather-resistant outer coat that can be any color except white. The hair around the head gives him a general foxy expression.