Cairn Terriers are multicoloured - the majority of kennels agree that if a Cairn Terrier is one-colour, it means it isn't pedigreed. Cairn terriers have several types of colours - some of them are black with light strains, creamy and greyish. Usually newly born puppies are one-colour but lately, their fur changes the colour. Cairn Terriers also change their fur colour into more silver when are getting old.