The Cairn Terrier is a little dog that loves people. They usually weigh around 13-14 pounds when they are full grown. They have a double coat. They have a good thick undercoat and long, harsh outercoat to resist the weather. The most common colors are wheaten, gray, red, almost black or any of these colors mixed to form a brindle. Some may also have a black mask and black tipped ears. "Toto" from the "Wizard of Oz" movie was a Cairn Terrier.