The origins of the Cairn Terrier are closely tied to the Isles and Highlands of Scotland where they helped farmers seek out rats, foxes, badgers and otters that preyed upon their crops and domestic animals. Overall, Cairn Terriers are sunny in disposition and fun loving. They tend to be independent, not clingy, as befits a free thinking working dog. Cairns are not a “lap dog” but a companion par excellence.