Cairn Terriers come from the Scottish Highlands and the Isle of Skye, where they worked among cairns, the rock piles that dot the hills, bolting foxes and vermin. That job explains the short legs, broad foxy head, small upright ears and harsh, weather-resistant double coat. Colors run wheaten, cream, red, gray, brindle or near-black, never white, and brindles often keep changing for years. Toto in The Wizard of Oz was a Cairn.
Cairns tend to be cheerful, curious and confident, friendly with most people but independent enough to ignore a request they find dull. In Washington, that means a dog that enjoys a busy sidewalk and notices every squirrel along the way, so a secure leash matters. Expect some digging, chasing and barking when bored. The low-shedding coat needs weekly brushing and occasional stripping, and many Cairns live 13 to 15 years.